There is a slight chance you could get your BCH with the assist of your service providers, localbitcoin in this case, try to contact their support center and tell them what happen. Nevertheless, it really needs some significant effort for the providers to access 'directly' the private key.  They somehow might willingly to help faster if your money is a big amount.

Anyway, the thread isn't on the proper section, and you really need to start using real currency, not the shit scam one(BCH).