Problems with linking my internet phone number to my t-mobile ID

Same problem for me my number use to work that they gave me I had been logging in no problem and today I log in it says it didn’t recognize my number or my email, if it didn’t recognize my email how did I receive the verification code, I’m starting to really dislike this and move on to a different service it’s like they removed that number completely from me using it but it works on their end, it’s recognizable I’m starting to believe they don’t want us using our account but to call in, the reps are very nice but even they couldn’t get it to work on my end, but they can get in it on their end using my number that’s bull their doing something on their end talking about I hadn’t set up a ID my Id is my email which I been paying my bill through my account for about a year but I ain’t been set up they tell you anything