MTN Contract Department is a nightmare

MTN contract department is a nightmare to deal with. My contract ended in August. And I had already made a request to cancel the contract. However it didn’t go through. The next thing R600 was to be deducted in a contract that ended in August. I was told it was due to the fact that I was provisioned of which I blatantly refused when they called in August. On top of that I made a query on Facebook and told them they must take their minutes and data of which they did. Now then comes my question they took their minutes, contract ended in August what am I still paying R600 for?. I queried on Facebook again I was told it’s for the other number I told them it can’t be because it’s data Sim contract which cost less than R200. MTN contract department when you call you get sent from pillar to post. For enquiring about your own money. No one will give you the answer as to what exactly the billing is for.