I purchased the wireless version of the Draytek 2925 from Amazon along with 2 Draytek 130 FTTC modems.

The connection on the modems seems rock solid, but the router is having some serious issues, the first is that most websites do not load, google works sometimes and Facebook doesn't load most pictures. It is definately the router as a different router works with the draytek modems.

I have since tried upgrading the firmware which did update successfuly however now the router just hangs, and no LAN or WAN traffic work and the internet stops working for the whole network, this happens anywhere from a few minuites to an hour. This has to be the worst router I've ever owned and I've owned some crappy routers.

What the hell am I doing wrong?!

Not normal.
Did you buy a UK spec/UK supported product...if so ask UK support for assistance. If it's an import, check with your supplier or Taiwan support.

When updated firmware did you use the *rst* file extension? (will reset everyhting but will give a clean instal)
If not try reset the router & try again