No internet access for 2 months

I have never seen such a useless network. They take your money every month but they cannot deliver a service. I have been having a problem with my internet for 2 months now, it says connected but no internet access. Coverage has been checked a lot of times and my area has coverage. I call MTN almost every day, I spoke to their customer service, network coverage department, technical team, and I even went to the MTN store 3 times. and nobody has been able to pick up the problem. Recently my call was escalated to customer service assurance but nothing came out of that either. All they do is resolve my calls without even confirming with me if I am fine. I have been given a million references that lead nowhere. I cannot even cancel the contract because there's a high penalty. Now I am stuck with a contract that does not help me in any way.