Bad Service Incorrect billing

I have a complaint about telkom. Opened a contract with them last year October and they were debiting from an incorrect bank account. When I received my statement I was charged debit Order reject fee. On Friday 09th April 2021 I spoke to a sales consultant by the name of Mohammed how assured me that the issue will be resolved within 48 hours. My mobile wife is being blocked and they are billing me for services I'm not using.