Telkom has no customer service

My account is off for 3 months now. I missed one payment. The next month telkom didn't deduct the amount that was in the invoice. Tried going to the story tried phoning the customer care to get my lines open. This time around they deduct on other dates that wasn't agreed upon in our contract. The last month they didn't deduct at all and I'm still waiting on response as to why I wasn't deducted and the way forward