Honda Civic Car Alarm issues?

My car just got out of the shop after being in a wreck. I have a 2003 Honda Civic w a manual transmission. My car remote unlock button does not work. If i push on it, it simply beeps but will not unlock? So now I have to use the key to get in and every time I do the alarm goes off. To make the alarm go off i can use the remote to look it and turn it off. But i can't unlock it with the remote. I have changed the batteries in the remote. The cover of the unlock button has fallen off from wear and tear also. What could this be? Do i need a new remote? Or could it be the fuse?

It's been badly repaired, take it back and get them to fix it