thanks for the quick reply.
I also tried Titanium and it said it can't access root. I actually paid for the full version of Titanium but Ican't access it now because another new problem is that google play store has stopped functioning.
I uninstalled and installed it again but it's still the same.
I didn't backup before trying to root so I'm stuck with a semi brick at the moment without google play store functioning.
Is there a way to get the rom for the 860s2 so that I can do a full factory reset from recovery?
Any suggestions that might help?