I recently had a crown fitted to a back molar. However, it doesn't fit correctly. My bite is off and the only teeth that make contact with each other are the crowned tooth and the one above it. What can be done to correct this? As a result I cannot chew properly and am afraid it will eventually damage my jaw and other teeth.

It doesn't mean the crown doesn't fit. Sometimes it takes another follow up to have the occlusion adjusted to make all teeth work in unison.