Renault megane grand scenic Rear Window Stuck down, need help please?

This went about 2 months ago it was the rear drivers side, got someone to look at it, he fixed it, so it worked again.

This morning I came out and found window down and there was torrential rain all night so everything was saturated.

Tried the double lock which used to work....nothing
Tried fuse suggestion....nothing
Tried battery suggestion....nothing

Now I'm stuck as to what it is and Renault want to put through diagnostics test and then charge for part if needs replacing......

There is no clicking when trying to make it go up and the switch doesn't work....

Any suggestions in the meantime as I have to collect my kids tomorrow and will be stuck indoors.....HELP!!!

Kraig
November 2011