Disgusting service

I sold my car in June 2021 , i informed netstar of this, but every month i had debit orders collecting from my account, i stopped these debit orders and then had my account handed over to legal, i made the legal team too aware that i sold my vehicle and that i informed netstar of this, i then had a setoff done on my account. The debit orders are still collecting. I have cancelled again on the whatsapp line but noone contacted me, i called in and spoke to Taryn to cancel my service which she promised me she did, but yet again there was another debit, i then spoke to Melissa she too told me its cancelled and yet and behold another debit order went off, i called Vuyokazi and asked her to speak to her team leader, she told me that she would get Meegan to call me with regards to this but till today i have not received a call from Meegan and i only keep getting sms telling me i owe money