Nokia :: E72 - Phone Not Working

I honestly don't know whats up with my phone, I bought my E72 around 2 months ago and paired it with a no contract pay monthly deal from T-Mobile and it worked perfectly fine till now. Earlier this week I got an angry text message from someone because they had called my phone over 10 times over the course of the day and left voicemails but didn't answer. My phone hadn't rung and showed no missed calls or even voicmail messages. It sputtered a bit after that, having bad connectivity in areas that it used to perform fine before, until it reached the point where I had no connectivity anywhere! Every now and again i get some bars appear but when I make a call they quickly dissapear and the phone says no network coverage.

Obviously I guessed this must have been a screwup from T-Mobile and I spent all my morning yesterday pacing back an forth in one of their outlets as the kids behind the desk called up different people trying to figure out why it doesn't work. First thing that was checked was the phones settings, which seemed fine, then they switched the sim card assuming it had died. After that made no change they had someone over the phone reset the service settings (whatever the hell that is). They even tried the SIM card on a phone they had there and it worked perfectly. After a couple other dead ends we tried restoring the factory settings on the phone which allowed us to make one phone call to their offices landline.

But any other call didn't work, and its been that way since either having no connectivity or occasionally letting one get through but cutting of any sound from my mic. Oddly enough I get text messages and my email works fine (which i heard doesn't use WiFi, only the phone services connection) so im at wits end with this. I will me more than glad to apologize if this turns out to be a problem with T-Mobile, but after all my insisting I see no results from complaining to T mobile. I'd like to hear some feedback on what could have possibly gone wrong. My phone has not gotten wet recently and it wasn't dropped, in fact I cant think of any reason that might have sparked this problem. Sorry for turning this into a short novel, but I am desperate to find anyone who might have a clue whats going on. I plan to visit another t mobile store soon and a nokia outlet as well to see who might help but any support is more than welcome.