Find out if mould is alchohol soluable. Or if it can be washed off with water. If water will wash it then it can be cleaned. THC is only soluable by alcohol. You may have a good chance yet to save it. Seems like it could be washed with water since that's what mould needs to grow.
Wash those buds good with cold water it will not hurt them. Hell there is a water cure for buds . Do a search. Sorry if I jumped the gun.