NXTl even when connected to wifi?

I'm at my its end with this boostberry. I have the 8350i unlimited 50 bucks a month. For some reason all the sudden my data has gone away. My understanding is that the 'L' is for data. I have tried a restore of an older version I had. I have tried reinstalling the service books properly. I am just at a point where I dont know what to do next. I can't send or receive any txts like I once could. I also can't register my bb like I've tried a million times via options-adv opt- hosting table- register... etc. Ugh someone please help. I have looked through out the threads and I cant seem to find anything that is specifically helping this problem PLEASE help thanks

Your service books may not be installed properly. How many service books show after uploading to the phone?