BB Curve :: Trackpad On 9300 Broken For 5th Time / Cannot Click Or Scroll At All

The trackpad on my curve 9300 keeps breaking. I cannot click or scroll at all. Normally, it's not too bad with a few attempts of taking the battery out then putting it back in, but last night, the screen went white - again - so I took the battery out and it said I had no battery though I had at least 40% on there. When I put the battery back in, and the phone began loading, the menu thing came up. I tried to click, 'unlock' and nothing happened. Seconds later, the screen went black as if the phone doesn't recognize my trackpad anymore. I am sick and tired of having a phone that doesn't work! I wouldn't be as mad if it was the first time, but the thing is, it's happened before and every time I go to the phone shop, they say 'oh, it's not our fault, we'll send it off for repair' and when I eventually get it back (2 weeks later) it works for 4 weeks, and I send it off again. I have sent the [hone of 4 times for 'repair' and each time, it takes 2 weeks; that's 8 weeks, or 2 months that I still have to pay 25 pounds in my contract for a phone that doesn't even work. That's 50 pounds wasted on the worst phone available. I got my current phone back in September (after fighting with my phone provider) and it broke in February.