Turkcell Doesn't Fix High Ping Problem

I have been experiencing constant high ping problems with my Turkcell Superbox internet service in Ankara Çankaya. The ping is always high and this affects my internet use negatively at all times, especially when I need a stable connection. Despite reporting this issue to Turkcell customer service, the problem has not been resolved. Instead of providing a real solution, I feel that I have only been given excuses and misleading information, and the service quality has not improved at all. I request that my internet connection be technically fixed as soon as possible and that, if necessary, my modem be changed or I be provided with a better quality and more stable internet service. I expect this issue to be taken seriously and resolved without further loss of time.