open a t mobile account outside of united state + unlock a phone outside us

Hi ladies and gentlemen , so i have an issue with my phone that i haven’t a long time since bought it , i realesed that the phone is sim locked and work only with turbo sim ( i don’t even know if it’s legal ) , so i started to think to unlock it but i can’t even make an account to order an unlock for my phone because they keep ask me for a us phone number ( to note i’m living outside the us ) , so should i keep using it like this or there is another way to unlock it or at least open a t mobile account ?