Vodacom's Appalling conduct of business

Vodacom is an appalling business! I Gave notice to cancel my Contract in writing almost 5 months before my contract ended and explicitly told them that if they deduct money off my debit-order after my contract expires I will reverse those debit orders. With that notice they still deducted money for almost 6 months I managed to reverse 3 of those unconsented payments. Then they handed me to HPD Attorneys for those reversals, Not Vodacom or HPD can give me answers of proof that I owe them money let alone giving me back my money they took without permission. All they do is keep sending me the same statement which clearly shows the money they took without my permission for 5 debit orders. I keep sending them my written correspondence to Vodacom about my cancellation and they just ignore it and refuse to explain why they did this or to fix their error. This is disgusting behaviour because consumers are just a number to them They have blocked my phone thus cutting me off from communication to anyone and even OTP’s They should be ashamed of themselves don’t use this company they are dishonest and unprofessional.