MTN customer service

I hope this gets me somewhere, because I am fed up. In March 2018 I cancelled a contract with MTN, I had to pay a settlement amount of 5K, but just to find that some useless human being never cancelled the contract. After about 6 months they started debiting from my account again. After querying about this at my local MTN branch, I was told that they must have thought I paid my contract in advance, and my credit was finished, that's why they debited my account again. So, after a big struggle finding the e-mail adress for customer care, I lodge an complaint. If I wasn't a pain on their asses they would never come back to me. The last mail I received last week stated that my matter was escalated to the financial department and they are waiting for approval, FOR WHAT!!!! In the meanwhile another debit went off! So you can imagine the fury running through my veins! They are very quick to phone you when you are in arrears, but when they owe you, it's a mission!!!! They are totally unprofessional and useless!!!!