I would like to complain about Vodacom and their nature of ripping clients off and damaging their credit score

I would like to complain about Vodacom and their nature of ripping clients off and damaging their credit score. I canceled my contract in May 2022 However Vodacom feels the need debit me every month for a service I no longer have with them and have brought it to their attention on numerous occasions, so I am fed up at this point and wish to expose them for the ******* they are