T-Mobile 9.99 Misterious Charge Internet

Hi,

I has a scary experience happened me tonight after speaking to a T-Mobile rep. i found the charge on my phone and was told that a third party send me a message to download a music. Here is the thing, my phone does now have that capability (well i have a dumb smart phone), and then she said that it was possible thru Facebook on my phone (my phone does not have access to Facebook; it's a dumb smart phone).

 I asked her to give me proof of when, it happen. She told me that only the third party could give me such proof. I ask for the third parties information (she gave me this number 800-235-7105), i told here that i was going to give them a call tomorrow, and bid her goodnight. Before i was done saying good, she retract and told me not to call and that she could call for me and make sure that i got a full refund on my next billing cycle.

Am i the only person scared by this, a big company cannot still millions they will get caught. but if they can skim every single person 10$/month/millions of customers (many of which will not check their bill thoroughly. they can make a hell of a lot of money. Two months ago my sisters told me about this. Of course i did not believe them, they are not responsible with their money. I lived it today and it scares me. So if it is not T-Mobile, i dont' know who accepted that fake charge by T-Mobile for me.