Dial for timer and knob on it, has fallen apart, so i can't start dryer. ?

The dial which shows time settings, and the knob to turn it on, has fallen apart. The numerical timer dial has split into two parts and silver turning knob on that, has come off !!! i cannot turn on dryer, although start dial seems fine !!! what can be done ?? This is a Hotpoint Frontload Dryer, probably about a 1995 model (?).