Useless service and ISP.

I contacted the technical department on Thursday 10 April 2025 because of slow speed. Note that I had internet service when contacting them. The technician made a change at the tower, told me to switch off my router for 15 minutes then switch back on and do a reset. I did that and then had NO internet service. I contacted them again and was then told that someone will phone me on Friday 11 April. I got a call on Friday but was not at home. They promised to phone me at 1pm when I would be home. Got no phone call. I phoned them and was told they will phone me later. I told them to phone me before 4pm as I need to leave the house by then. They phoned after 4pm. I phoned again on Saturday, and was promised again that they would call me. No call. Today, Monday 14 April I phoned them at 1.25pm. I was promised a call back before 3pm. Needless to say that I have not received a call back. There service is absolutely USELESS! Going from slow speed to absolutely NO SERVICE is rediculous! I have now spent nearly R600 on mobile data since Friday. I will be cancelling my contract with them with immediate effect.