still waiting for refund

I made a payment into nashua mobile on 29th dec 2014.nashua mobile closes down.I request a refund as the money does not reflect with mtn.I have been struggling for over 2months to get my money refunded.I spoke to 3 mtn consultants that could not assist me.I'm waiting over a month for a outcome from a consultant in parow.nashua mobile cannot assist,mtn cannot assist me and my account keeps on going in arrears.I have never received such bad service in my life.I renewed my contract with mtn and I wish I didn't.my fone gets switched off every month because no-one has the proper knowledge to assist.I'm spending time and petrol on driving up and down and no outcome.