Astra Convertible roof wont work?

I have a 1.8 i Astra Soft top. 55 plate. This is the second time that my roof wont work, I too get a noise coming from the foot well when ever handbrake put on or car starting up. I have had back to vauxhalls several times. They have said its a fuse, however I don't want to keep taking it back. Which fuse is and what number is it located at. It is not the 40amp in slots 1 and 3 as I have changed them already. Please Help