Bad account keeping

I have a contract with them for the phone its been 3 years now, at first things were fine but this year their account department is not updating my monthly payments i make for the phone, today they've suspended my account due to money owed to them of which i don't owe them anything, in February this year i went to telkom shop to change my debit order from one bank to the other and the guy said it was done, for the next two months i must pay directly to telkom using my telkom app and on the third month they will debit my account, i did just as advised but my account still says i am owing them money, their customer service is non existence, i don't know why they would say the have a customer service you can call when you cannot get through to a human being instead you are given a machine that gives you option not relating to your call, i am very frustrated and disappointed by the service I've received of late, wait...what service there's zero service from Telkom, just useless talking machine wasting your time, whats app service useless as well, my telkom app useless as well.