Mine did that Katie after a few months of use. Now only the grill works. Nothing you can do about it unless it's still under warranty (3 years) and you can replace it. Sorry.

The only things I can tell you Linda is the following:
You have to leave the oven door open whilst you grill
Fat builds up on the top element quickly from roasting or grilling and causes smoking. It's difficult to clean it off the roof due to the element getting in the way. I can only grill in mine now and I have to constantly wipe it down so it doesn't smoke too much. So now I stick to grilling stuff that doesn't splatter but even then it will smoke a little bit.

First you need a good light source, so if the oven light no longer works you will need a torch. The prongs on each of the side racks both bend in the same direction with one prongs being more bent than the other. With that in mind, use the torch or light to locate the rear hole on one side of the oven, then push the more bent prong in to the hole. Then you should be able to push the prong at the front end of the side rack in to the hole located at the front of the oven. Do the same on the other side. The main thing is to get the back prong fully in to the hole at the back of the oven first then with a bit of pressure the front prong should snap in.