Billing Issues and No Customer Satisfaction

I have had my MTN contract for a number of years now via Nashua Mobile.<br> November 2014 Nashua mobile closed down for good selling my Contract to MTN.<br> <br> Somewhere somehow weather it be Nashua or MTN someone has let me down as the paying customer. With Nashua Mobile my contract was simple, a debit order went of my bank account and airtime and data was loaded to my cell on or around the 1st of every month and should i want additional data or airtime all i had to do was load it. Now that i am an MTN customer my bill changes on a monthly basis, the contract has been changed to suit the SP and not me, i cannot load airtime to my cell if the SP blocks me for using my allocated airtime finished, i requested in store at the Glen Shopping Centre MTN to migrate to a contract wich allows me to controll my spend 2 months ago and nothing has happened, not even a phone call to say that they are not willing to help me.<br> <br> So i ask you now. what do i do as i have a contract that i didnt sign for and cannot use the way i want to.<br>