Handed us over for 2 years funds but was paid

MTN handed us over to attorneys saying that we never paid our MTN account, so they handed us over for a full 2 year period. And as a matter of fact we only owe 2 months no matter who we talk to the attorneys or the legal department of MTN this problem does not get solved. Now the attorneys say that they cannot do anything about our account MTNs legal department must sort it out. MTN changed the way the legal department works so now you phone in get a reference and quess what they never phone you back. Im so sick of wasting my time doing MTNs job to sort this account. Firsdt the attorneys told me to send all my paperwork proving that we paid took MTN a whole moth before they send me statements so I passed it along. 6 months later the excuse the attorneys now have is that they cannot open my PDF files that Ive send. This is really bad service. MTN stopped our debit order thats why 2 months is in arrears now. But hey they decided to hand us over for 24 months so instead of paying R1100 they now want us to pay R5990.00