Hi,
What is the model number of the camera?
You may be able to fix it by sourcing a non working or cheap same model camera (is [https://www.ebay.com/itm/295248037029?hash=item44be2784a5:g:LBsAAOSwpadiPoaQ|this] it?) and using it as a parts donor for your camera. If the example I linked is not the same model, search online e.g. Ebay, Craig's list etc for your model camera to see if there are any available, even non working as long as the lens appears to be OK and the price suits.
There doesn't seem to be any service manuals available online to help you to disassemble it but here's the ifixit [guide|9441] guide along with the ifixit [guide|2301] guide (not the same model but maybe still helpful) that may help you.