Mystery Lines On Your Account

Ordered an S23+ online as a new line (porting a number from another carrier) only to learn later that the shipping date was being delayed.  Since I won't be home to take the delivery (now a signature is required), I called TMobile CS and was advised to go into a store to pick up the same model after paying only the taxes (like the online order). Spoke to a man by the name of "Kevin" who told me he had the phone and asked me to come down. Once in the store, he tried relentlessly to convince me to get another phone (Google Pixel 8) for "free" with no monthly fee.  Upon refusing to take the deal several times claiming I had no need, he said it would help him, too.  If that was the case, I asked if he has the G Pixel, he said he would check and went into the back of the store.  He came back stating he didn't have the phone but it would be shipped to me.  Are you kidding me?  That completely beats the purpose of me going into the store as the reason I went into was because I wouldn't be home to take the original online delivery.  I told him I would stick to my original plan by picking up the S23+ only to which he replied by saying that he would have to charge me the activation fee - he previously said he was going to waive the fee just like the online order.  Just then, I got an alert message on my phone that "an authorized user" just added new lines to my account.  I immediately showed the message to him and said "was this you?"  He said "yes," while pointing to the S23+.  It appeared that he did this when he went into the back to check on the second phone (no wonder why he was there for almost 10 minutes).  I told him I never gave him the authorization to activate a new line and demanded the line be cancelled.  He said he did but when I called and spoke to the a TMobile CS once outside of the store, there were not one but two live lines that got added to my account.  I filed a formal complaint with the CS on the phone and will write to TMobile Executive Management to ensure they are made aware of this fraudulent activity.