Unhappy customer due to ******** registered on credit bureau

I have signed a contract for WIFI rooter in September 2021, all was going well due to promotion I was paying R199 and in the following year they increased to R209 without any communication and it was not a problem to me as I was satisfied with their services. In the beginning of 2023 it was increased to R375 and I continued to pay it without any complaint, and that was the beginning of my problems. In July 2023 that's where I realized that Telkom has a poor communication skill because my rooter was on without internet. I called them and I was not assisted they put me on hold for more than 30 minutes. Secondly I called and the lady who answered my call was rude to me and failed to assist me as when I explained my problem she said there is nothing they can do with my problem and I was supposed to upgrade as they are no longer maintaining those devices. My question was clear to her that who was supposed to inform me about the upgrading of new products? Where you not supposed to call you customers and inform them about your new developments? Then she didn't bother to listen to my frustration and state her point that there is nothing Telkom can do. In short I requested them to cancel the contract as they failed me and now I am paying the services they are not offering to me. They failed to do that and now I am receiving the summons from their lawyers for the services they failed to offer from July 2023 till now. My name is registered at credit berau as a bad payer while Telkom didn't treat me as a loyal customer. I hereby requesting them to settle that debt and clear my name with immediate effect.