You dont care about customers

My bank sent instructions to all my creditors have my debit orders switch as i have changed the banking details. Everyone else did except Telkom. When i logged onto my account in March i realised that they were not debiting and they have been penalising me for returned debit orders. I escalated through the chat process and had my banking details updated. I also sent the proof that an instruction was sent to them therefore they must write off the charges. The consultant promised that she will escalate and i will get a call. No call was received.I paid the outstanding instalments excluding the fees. I followed up on my query on self service got smses that i will be contacted. No one did. Isent follow up email twice to the consultant who escalated my query still no response. I even went on facebook to escalate there i was never attended. The store told me they dont attend to online sales queries. Today Telkom tried to debit my account R497 instead of R300 the debit order returned as they are supposed to debit on the 20th not 15th. They did not write off the faulty penalty and now they adding more by debiting on the date that we did not agree on. I want Telkom to write off the penalties and stop debiting my account on the 15th. They been debiting on the 20th even when i updated my banking details i never gave authority to debit on the 15th.