Turkcell Superonline Cut My Internet and TV Then Canceled My Application

Last week, I applied for an internet subscription through Turkcell Superonline’s website. The next day, I was contacted by the installation team, who informed me they would come the following day. When they arrived, they attempted to pass the fiber cable through the junction box in my home but cut the existing internet cables of another provider, which I was actively using, to use them as a guide. When that failed, they then cut my TV antenna cable in another attempt, but that also didn’t work. At that point, they called me and told me I needed to hire an electrician. They promised to return the next day to complete the installation. I hired an electrician and tried calling them around 20-25 times, but they didn’t answer. When they finally picked up, I asked why they had disconnected my internet and TV, only for them to deny everything. Then they told me, "You spoke to us in a condescending manner, so we won’t be coming today either, and your application will be automatically canceled." In a later conversation, I was even threatened with, "I will cancel your subscription, and you will never be able to use any Turkcell service again." After that, the personnel blocked me. Now, I have no TV, no internet from my previous provider, and no response from Turkcell. Such employees severely damage the company’s reputation and reliability. Proper customer communication and professionalism should be prioritized in staff selection. I am absolutely not satisfied.