T-Mobile Cell Phone Company T-Moblie added a 3rd phone line without my knowledge on a 24 month promotion.

In May 2022, I called T-mobile to see what promotions they had where I could buy a phone and get a free phone with a 2nd line.  I was able to trade my old phone to get a discount on a new phone and a free phone.  That gave me the two lines I ask for.  They added a third phone line without my knowledge.  I do not have a third phone and I am paying for a line I have never used and do not even have a phone for.  They told me I added the line with the promotion.  I did not. 

I needed a second line for business.  I have no use for a third one and did not add one.  They said it is locked in until the promotion is over in May 2024, nine months from now.  I will continue to fight to get that off my bill.  I want everyone to know of this deceptive practice with T-Mobile.  I am very disappointed with them.  If I cancel my account with them now I will have to pay fee.  I will be leaving them as soon as possible.  I just found out today when I called them about my bill.