Billing account and blocked network services.

MTN blocked my services on April have paid R2500 at mtn pick pay kroonstad for February and 26 March,they have used my old billing account and I have been sending them emails that they should transfer the money into the new billing account so I can use my phone but, nothing.

They have told me to wait for 7_10 working days they will resolve the matter but even now I'm still waiting and my phone is not working.i have been going to the store to address them about the problem but nothing my phone still not working Now they sending me messages that I owe them R3700 but I will never pay that money before they pay back R2500. I did send proof of payment and bank statements to show I paid that money.

Please MTN STOP TAKING ME FOR **** AND GRANTED PLEASE PLEASE