Account handed over

My account has been handed over in 2014 due to that my husband lost his job and I couldnt afford to pay all the bills. The problem, MTN handed me over to two different attorneys it's been a fight over and over did not know who to pay. So I have made arrangements with one of the attorneys (VVM) to start paying the bill. (MBD) is still phoning me for payments on the account and I have explained the problem and still no luck I have sent e-mails and try to phone the customer care center at MTN and it's a automated answering system and it keeps on disconnecting. I did phone MTN Rustenburg spoke to a lady, her response to me ( I cannot assist you because the account has been handed over I must phone head office JHB. I cannot pay 2 different attorneys for the same account at MTN it just doesn't make sens.