Superonline Fiber Installation Delayed After Payment

I applied to Superonline for a 1000 Mbps / 50 Mbps fiber internet service (Customer No: 13571***) and paid ₺2,400 in advance on 13 July for the installation. An appointment was scheduled in the system with technician and retailer details. Despite the confirmed appointment and full payment, my installation was postponed, and I have now been waiting for one week without any real progress. No one visited my address for identity or document verification. Instead, I had to go to a Superonline branch myself, where incorrect information in my records was finally corrected. Even after this, no concrete step was taken to complete the installation. Rather than offering a prompt solution, I was given a new appointment for 1 August between 10:00 and 12:00, nearly two weeks later. During the past week, I have called Superonline customer service more than 30 times, requesting only a reasonable installation appointment. I have not received a callback, an earlier appointment, or any clear explanation. The screenshots I submitted show that my support requests remain unresolved, my e-Devlet application requires no approval, appointments were scheduled in the system, and my bank records confirm that Superonline collected the ₺2,400  payment. I live in Ankara, and it is difficult to understand why a fiber installation that normally takes about one hour has been delayed despite full payment. Being left without information or a definite installation date is unacceptable. If my installation is not completed and my service activated by tomorrow, I will cancel my application and request a full refund of the ₺2,400 I paid. I expect Superonline to contact me immediately, provide an earlier appointment, and activate the fiber service without further delay.