Turkcell Superonline Slow and Unreliable Internet

Turkcell's internet is not working properly and is extremely slow. We call every day, but there is no solution. They charge a fee to create a cancellation request or a trouble ticket. We are paying for an internet service that we cannot use. It is so slow that we cannot even access WhatsApp. There is no solution, and the call center employees are uninterested. Superonline is also not working, and mobile data is not working either. We cannot use the internet. The connection frequently drops