Hmm.. So u tried:
- turning the router on and off?
- pressing the blue > arrow next to your APN in Wi-Fi settings and selecting "Forget this network"?
SUCCESS!!!
Finally, tuning the router off for the umpteenth time fixed it (for now at least) and i have restored all y settings (without forgetting the network)
Phew, thanks fxit! Now i can go sleep in peace (and sleep at work tomorrow!