BB Curve :: 8520 Mobile Network/Internet Not Working?

I brought my BlackBerry a few weeks back, and brought the Data Plan (£5 for BBM, Internet etc for 1 month)... IT was working PERFECTLY until yesterday Morning... I woke up, checked my BBM as usual, Ended all the chats that were Broadcast Messages blah blah blah, and went to speak to one of my Contacts on BBM... THe message wouldnt send... I thought it's probably just slow or something.... Yet im still having the same problems now... Nearly 2 days it hasnt worked now, and it's getting very annoying!

Features that are being affected are;

- BBM
- Facebook App
- App World
- Browser

This is one message I usally get while trying to use the Browser:
"Unable to connect to the Internet, please try again later.
If the problem persists please contact your service provider."

Another thing that's really annoyed me is the fact that most people with a Similar problem to my has "gprs" in Lower Case letters, yet i have "GPRS" in Capitals, yet still not working.. I admit, on the rare occasion i can send a message but it takes ages, usually about 30 minutes. No matter where I go, whether it's my house, the woods, the town, anywhere, im getting the same problem, whereas before, I could go anywhere, including those 3 place and it would be FINE!!

I've done everything I could, Battery Removal, Wipe, SImple turned the Mobile Network off, then back on... NOTHING is helping!!

Until yesterday morning i had NO problems what so ever, then suddenly I get this!!!

I got my Phone from T-Mobile, and im with Vodafone