Our buttons (keypad) is broken on our westinghouse silhouette oven?

Our buttons (keypad) is broken on our westinghouse silhouette oven. Can this be fixed? At first it was only celcius button so we used the farenheit button. Then the off/reset button stopped working so to turn it off we had to take out the fuse. Then all the buttons stopped working so we can't even turn it on now. The oven is part of a unit with microwave and grill so we would prefer to fix it than have to buy all new. Thanks!