BAD CUSTOMER SERVICE - BAD REPAIR

I have a Blackberry 9720, I loved my phone.....for the first couple of months. It started to shut down by itself, restart, no battery sign so I sent it in for repairs. After 4 weeks I got a 'new' phone (which obviously was a old repaired phone). a couple of months after I got it back it started again! So I sent it back again! I got it back more or less 3 months ago and guess what! it doesn't even want to switch on now. The only way you can switch it back on is if you move the battery op and down to make a connection and if you are luck you can put the back casing back without disturbing the battery again. I am FED up with vodacom's repair centre and I don't want to wait another 4 WEEKS to get my phone fixed or replaced!