Pathetic service yet again

My cellphone contract has been upgraded in December after a few months of trying. Service received only after a hello peter complaint. I am currently being billed for double the contract amount. Called the call centre a month ago, after 2 hours of waiting and having callcentre staff put the phone down when they couldn't assist only to find that Telkom took it upon themselves to *******ly add an add on service to my contract whereby i receive 5gb of data. I have not given any autorisation for any additional offerings on my contract. The lady who assisted me assured me that this will not happen again. She will refer it to back office who will remove the add on and refund my money. A month later Telkom double debits me again. Why does a customer have to go to social media to get assistance. Can't Telkom staff do their job properly. Adding add ons on customers account without authorisation is ******* and just for the record, the add on was added with absolutely no Data received. TELKOM - REMOVE THIS ADD ON AND REFUND ME THE MONEY THAT YOU HAVE BEEN *******LY TAKING FOR A FEW MONTHS NOW.