Account overcharged, ***** and Staff incompetence

My mom Nonkululeko Mpontshane has a contract with Telkom on behalf of my brother Thamsanqa that they’ve had for years, since last month they deducted R800 extra from the initial R1500 that was agreed on and when my brother checked the statement sent via email there was a number he didn’t know and when he called the Telkom call centre they confirmed it is someone else that bought data on the contract plan but they don’t know how. We then asked them to investigate and remove that number from the contract they said it was fixed, my mother went to ABSA bank to reverse the debit order and then paid the correct amount R1500 at Shoprite, but what happened the end of last month they cut of the data supply because of “Arrears” owing and yesterday 25/11/2024 they deducted R3000 from my mother’s bank account. We are being sent from pillar to post at the Telkom call centre and the agents drops the calls on us and we hold for hours. This is very inconvenient because my mother is a pensioner and does not deserve this day light ******* especially someone who always pays their account on time. SOMEONE AT TELKOM FIX THIS ASAP !!! THIS NOT RIGHT ROBBING A PENSIONER