Blank display, crazy amounts of dropped calls

Hey, I'm hoping to get more help here than at the Motorola site, because the customer support there is pretty shoddy in my opinion. Well, I've had this particular phone for around 6-8 months, and I haven't abused, mistreated, or otherwise damaged my phone at all. A couple months ago my phone started dropping calls repeatedly and often, and it's gotten progressively worse, but since it would cost me $50 and the time and effort to re-take pictures and re-acquire phone numbers I haven't sent it in for a replacement. Now today I woke up and the display worked fine, I put it in my pocket and a few hours later I took it out and, poof, no display whatsoever. Not the front, smaller screen or the one on the inside of the flip. The phone still makes calls and sounds, and apparently can be operated, but no screen. My last phone also got a broken screen, and after running rings to try to get a repair, I finally caved and got a replacement. I don't want to do this again, because that would mean spending almost 6x what this phone is now worth overall on keeping my phone working. This is supposed to be a good quality phone, and I've had the same problem on the last two I've had. I don't know what could have caused the random shutting off of my screen, last time it was a combination of wear and static electricity, but this one was sitting in my pocket perfectly safe from the world and died anyways. I don't know what to do. Any help would be immensely appreciated, because I'm not getting much from the manufacturers other than "Send it in and get a new one for 50 dollars!" and I can't send it in for repairs because I'd need a proof of purchase, and the replacement that they sent me didn't come with a receipt to my knowledge. I'm stuck here. Please help.