MTN bad service lost my business

ref: *** I have been advised that I have a contract renewal or upgrade due. After 10 calls to the 135 number and more than 30 hours over the phone. I requested the contract upgrade. This process is now in a dead loop for almost 2 months now. The cancellations or retentions department does not respond and I realize that the service with MTN is so very bad. I am now forced to go to a shop and cancel from there during covid and move to another service provider that will want my personal and company telecoms business.