Windscreen jets stopped working

Hi all,

Now got an issue with my windscreen jets not working. Sounds like the pump is making noise, headlight washers are ok, rear window is working fine and wipers are working so don't think it's the fuse.

Not worked right since they replaced a fuel injector a few weeks ago and finally stopped completely today. Anyone know if they have to take off front of car to replace an injector on the 1.4 IV model? 

When they did the injector the filter on the water bottle spout went missing and I don't want them to blame me as contaminating the bottle.

Basically want to know if they would of had to mess with the water reservoir to replace the injector?