Replace the hose, drain / refill the cooling system, removing airlocks and warm it up following the manual advise (haynes or whatever)...
It sounds like over-pressurising could have cause it to blow, which means Head Gasket Failure..... but it's worth testing it first.
It sounds like over-pressurising could have cause it to blow, which means Head Gasket Failure..... but it's worth testing it first.