Horrible service & bullying tactics

Cell C are bullies & ******s! I took out a data plan contract with Cell C in 2021 for a monthly fee of R161 over 24 months (10GB per month). After only a few months on the contract (all the debits were going off successfully monthly),I started experiencing difficulty connecting to the Wi-Fi through the router provided by Cell C because they said my number was one of the numbers affected by the migration that had taken place. I then called Cell C to assist me with my connectivity issue as the debits were still going off my bank account. I called their customer service line numerous times & each time I was just given a reference number & directed to call their technical department, but received no resolution to my query. I called the technical line many times at my own cost while having to hold on the line for more than an hour at a time at my own cost. The debits still continued to be deducted from my account all this time. Out of frustration, I reversed the debit orders in order to get Cell C's attention which I did. I started receiving calls from their collection department demanding payment, however they still failed to assist me with connectivity. Every month the data loaded on the sim would expire as I was not using it.I was basically paying for nothing hence the reason for reversing the debits as well. Cell C has now handed my account over to CSS for collection & I receive calls/SMSs daily. The account is accumulating charges each time they call me. This service provider is bullying me into paying for services they failed to provide as per our contract & have now also affected my credit profile on the credit bureaus.