BB Pearl :: Don't Get Flashing LEDs

I have had a Pearl 9105 for about 2 weeks now and really liked it until a few hours ago when I found it dead, switched off and not responding to anything. I had been having some trouble with one particular contact - sometimes I wasn't allowed to check our text message conversation and when selecting 'compose SMS' to this person nothing happened. To try to verify this I took the battery out and re-inserted it. The phone started rebooting itself with the black screen and progress bar and I put it in the holster I have for it. However it continued to boot and as far as I can remember it booted fully and I was able to check the conversation that previously has refused to open. However I went for a walk with my family and a few hours later took my phone out to check it and the screen was black.

I left it charging all night last night and at lunch, when I used it for a while showing a photo slideshow to my sister, it said battery was 80%. When I got home I plugged it in to charge, in 2 different sockets, and also connected it to my computer. Nothing happened. Device manager also refused to open (I am now reinstalling to see if this does anything). I have removed and replaced the battery several times, taken out the sim card, tried what other people suggest (starting to charge without battery) but nothing happens. I don't even get flashing LEDs. It is absolutely dead. I am rather cross about the lack of customer service for RIM in the UK. I phoned their only UK number to be told they are closed and dialed 3 for their technical support, first time they hung up and second I got through to American support (yet to see if I was charged for this).