telkom billing

i am currently having issues with telkom billing system and contact centre. for the past 3 months i've been struggling to get the billing issue resolved for more than 3mnths now. every time i contact them which is extremely tedious and frustrating to get hold of the call centre agents. beginning October 2018 i have changed my bank details and called telkom to change them so they can debit the correct amount, which they didn't and i was charged rejection fee of R200 which i still refuse to pay as i did everything i could in due time. again in November they still debited the incorrect bank account number which they again charged a rejection fee - eventually they credited the 1st rejection fee. now i have been asking them to write off the other rejection fee but no one seem to understand the query. on the 7th of January i called again and i was told by the agent the issue has been escalated to the finance dept and i will get notification in 72hrs which i never received any, today it is the 17th of January 2019 still nothing. getting through their 081180 is so frustrating. telkom's website is as useless.