Fraudulent Sale of My SIM card

This just happened to me last week! I've a phone notifications that I've purchased two sims cards and I quickly called T mobile and was told that someone used a fake driver's license to purchase two SIM cards under my name at a t mobile store!!! How could this happened??? My questions to T-Mobile is why can't you tell me which store the thieves went to get the SIM card from? I was told by T-Mobile CSR that this won't be reported but if I want to I'm welcome to?! Why is this not reported to the police by T-Mobile? Does T mobile just feel identity thief is not their concern if their customers account being compromised? 
I have never been had any identity theft and I didn't do any unusual purchase or gone to any site except I went to t- mobile store once to make an enquiry about my phone line and months later, I had this identity theft issue! Coincidentally the store I went into, was no longer there in the same location! This to me is highly suspicious! Although t mobile rep said they won't charge me that two SIM cards and had terminated the lines…  it is still a major concern that "someone" did walk in to their store to present a fake ID OF ME! That's very concerning! It is not enough just to say T-Mobile cares about their customers but yet don't report this or share which store the fraud being committed. Please do more than just words.