Unreachable After Switching From Vodafone to Turkcell

About three months ago, I ported my number from Vodafone to Turkcell. However, for the past two months, I have been facing a serious issue: when people using Vodafone lines try to call me, they hear a message saying “This number does not exist” and cannot reach me. As a result, I am missing important calls and experiencing significant inconvenience. I have reported this problem to Turkcell customer service multiple times, and while a request is created each time, no solution is ever provided. Calling customer service has almost become part of my weekly routine. Sometimes they claim, “We called you,” but despite me pointing out that the issue is precisely that I cannot be reached, no progress is made. Today they suggested I call 120 BTK, but BTK said the matter was not under their responsibility. Turkcell then told me again to contact Vodafone. Each side keeps shifting responsibility to the other, but my problem continues. While they have no trouble reaching me when it comes to billing, it is unacceptable that such a fundamental communication issue remains unresolved. I urgently request that this problem be fixed and that my line can be called without issues by Vodafone users as well.