help no fuel when pushing accelerator down

anyone ever had problem with fuel pump just had new one fitted on my gti rivage driven for a week and now now fuel when ccelerating any ideas

Dirty fuel filter?
Correct fuel pump fitted?

Fuel pump either goes or it doesn't, so I doubt its that. Why was it replaced?

More details please, does it stall or do you KNOW no fuel is delivered? Does this happen when throttle is fully depressed (wide open throttle) or part throttle, or none? When sitting on the driveway (no gears) or during driving? Is it driveable at all or do you get so little power, it won't move or will only move inches?

hi the reason pump was replaced was because water got into it and rusted i also had all the injectors changed as they were knackered,it happened when i was driving just totally lost all power through accelerator could it be electrical????

Its very unlikely to be electrical since its a mechanical fuel injection system. If you've had the injectors replaced, you'd need to accurately reset the mixture. If its running really bad then a fuel pressure check too, could offer more clues.