Pathetic Service From Vodacom

After being a vodacom customer for about 8 years, I decided to cancel my contract with them as they had become so expensive for what you get. I went through the cancellation process in December 2023, to which I paid a pre-cancellation fee. My account was moved to prepaid on the 30th of December 2023 and I ported my number to Telkom on the 15th of Jan 2024. I then received a debit order at the end of Jan for my normal monthly amount which I reversed because there shouldnt be a debit order going off. I have tried to phone Vodacom several times and spent more than an hour on hold trying to get through to a department which is actually able to assist. Vodacom has subsequently added a late payment fee stating that my account has gone to prelegal, except you cant speak to anyone and get proper information to actually get assisted. How is it that such pathetic service comes from a multi million company?