Alarm fun and games

I put my GTA into a local alarm place to fit a new one and pull out the faulty one. What a disaster . Got it back monday only to find electric windows and central locking didnt work. Took it back Tuesday. Went to pick it up and found them dismantling the car to find the fuel pump which now wasn't working, turned out was just the fuel pump relay playing up nothing to do with them . They put it all back together and it all seemed to work but now some of my dash doesn't light up and the interior light no longer works! Blokes face was a picture when I told him today!