Deductions bordering on ********** and POOR service delivery

Continuous deductions via debit order for an account contract which effectively EXPIRED in October 2021 already. When contacting Customer Service one is transferred from one department to another and finally, the call is ended abruptly with no resolution. To date NO credit for all the deductions. Instead, I have been contacted today with an offer to upgrade with MTN...Hell NO!!! I've been a loyal, polite and tolerant customer but their blatant disregard of their contractual obligations toward their customers, their tendency to blame-shift, their ignorance and failure to address and rectify the shortcoming has finally succeed in driving to sign with another service provider. Ineptocracy and extremely poor service delivery is not a way to retain me as a customer. I may be a small fish to them in their very big pond, but word of mouth has proven to be a powerful instrument in the demise of many companies...