Disgusting service

My phone is disconnected due to insufficient funds in my account so in May I called telkom to change the banking details but they continued to debit the old account. Eventually in November the decided to use the account that I gave them but only deducted half of what was owed and continued to disconnect the phone in December they deducted the whole amount but the phone is still disconnected.

When I call their customer careline the call center constultants are clueless to why the phone is still disconnected and they are rude. The last consultant told me to contact their collection department and find out why. Their managers keep promising to sort it out but nothing. Telkom is the worst mobile service provider their mobile app doesn't work as well I am so disgusted the nerve of that consultant to tell me to cancel the contract if I'm not happy because clearly they are ***********