Re: Can this be fixed?
Anything can be fixed. If you post some pics of damage, it will make it easier to get the right advise.
In general, if you have scraped deep into, or through fiberglass hull bottom, you'll have to clean up area around damage, and repair with fiberglass and resin. I would use epoxy resin, since we are talking about hull bottom.
Hard to say much more than that, without seeing damage.