has anyone else been scammed by T-Mobile?

T mobile is horrible and very expensive!! I purchased my iPhone 14 Pro around May/June did not pay it in full I was doing payments and I still am till this day. A few months ago I noticed my bill go up and I seen 2 iPhone 15 pros were added to my account when I asked them about it they said I purchased the phone with a check signed "Jane doe" I communicated that I did not purchase those phone and I never had those phones and I told them to transfer me to their fraud department. But first in my understanding how can y'all let someone on my account sign a check under the name Jane Doe ???? I just feel like the payment should've never even been able to go through they ended up cancelling those phones on my line but my billing was still high .i  was paying $174 a month for a "free " Apple Watch and my iPhone 14 Pro and since they had those phones on my acct I am now paying 263 monthly