Pathetic service

I have paid my account in full on the 12th of January 2016, my account is STILL with the legal department, i am unable to get my balance due that needs to be paid to keep my account up to date and Eugene from the legal department gave me his number and advised that i should contact him after the 13th of feb to get the new balance, i phoned him 3 times to no avail as he does not answer the phone, its been over a month and still nothing has changed from my previous complaint, this is breach of contract on MTN'S side and I WILL NOT BE HELD RESPONSIBLE if my account is not paid on time, and MTN must dare suspend my line due to their poor service then i will take the necessary legal action against MTN. ITS THE WORTS SERVICE I HAVE EVER RECEIVED, the accounts department is not helpfull either.