ViewModel access from ViewController and same ViewModel

Hello, im moving to extjs5 and writing an application from scratch.

I have a view that contains (among other things) this

Code:

{
                                    xtype: 'panel',
                                    flex: 1,
                                    margin: '0 10 5 0',
                                    layout: {
                                        type: 'hbox',
                                        pack: 'end'
                                    },
                                    items: {
                                        xtype: 'displayfield',
                                        name: 'statusBanner',
                                        bind: '{astatus}'
                                    }
                                }

Then i have this inside my viewModel

Code:

Ext.define('cc.view.Agent.AgentModel', {
    extend: 'Ext.app.ViewModel',
    alias: 'viewmodel.agent',
    data: {
        astatus: 'unknown'
    },
    formulas: {
        agentname: function (a) {
            var infoObj = JSON.parse(localStorage.getItem("infoLogin"));
            if (infoObj !== undefined)
            {
                return infoObj.user.usuario;
            }
            return 'ND';
        }
    }
    ,
    stores: {
        Agents: {
            storeID: 'agentsStore',
            fields: ['name', 'type', 'status', 'contact', 'maxNoAnswer', 'wrapUpTime', 'rejectDelayTime', 'busyDelayTime'],
            proxy: {
                type: 'ajax',
                url: '/cccore/agents',
                reader: {
                    type: 'json',
                    rootProperty: 'agents',
                    successProperty: 'success',
                    totalProperty: 'total'
                }
            },
            filters: [{
                    property: 'name',
                    value: '{agentname}',
                    operator: '='
                }],
            listeners : {
                load: {
                    fn: function(){
                        console.log(); //<<<<---- from here
                    }
                }
            },
            autoLoad: true
        }
    }
});

How can i, where says 'from here' set the value of astatus inside data? (meaning with this, i want to astatus be setted with the status field of the first record from the store)

after that, on my viewController i have this

Code:

Ext.define('cc.view.Agent.AgentController', {
    extend: 'Ext.app.ViewController',
    alias: 'controller.agent',
    //aca tengo que escribir los metodos para procesar los eventos
    onClickNoDisponible: function () {
        this.changeStatus('Logged Out');
    },
    onClickDisponible: function () {
        this.changeStatus('Available');
    },
    onClickManual: function () {
        this.changeStatus('Available (On Demand)');
    },
    onClickDescanso: function () {
        this.changeStatus('On Break');
    },
    changeStatus: function (status) {
        //crear form, submitear, dar load al store de agentes
        var form = Ext.create('Ext.form.Panel', {
            items: [
                {
                    xtype: 'hiddenfield',
                    name: 'username',
                    value: this.getViewModel().get('agentname')
                },
                {
                    xtype: 'hiddenfield',
                    name: 'status',
                    value: status
                }
            ]
        });
        
//        console.log(status+" for "+this.getViewModel().get('agentname'));
//        console.log(this.getViewModel().getStore('Agents'));
        if (form.isValid()) {
            form.submit({
                url: '/cccore/agentstatus',
                method: 'POST',
                success: function (form, action) {
//FROM HERE <----------------------------- FROM HERE
                },
                failure: function (form, action) {
                    Ext.Msg.alert('Error en comando', action.result.msg);
                }
            });
        }
    }


});

how can i call to load again the Agents store inside my viewModel?

Sorry to ask this, i've been trying and i cannot realize it

ViewModel access from ViewController and same ViewModel