Poorly debited

I must be honest ivr been with telkom for the fourth year now but the past six months ive received terrible service.

Ive recently upgraded my contract and theyve debited me a etxra 349 and 30 rands that they keep reversing and apologising and debiting it again this month they asking for 1600 to be paid on an error they keep making. Called the call centre and spoke to the worst ever rude arrogant manager by the name of Sibusiso. He gave me attitude like i was in the wrong