Fix my dropped Mamiya 7? (UK)

[Ti29er]

My 7 was dropped, not by me, and the 3x lens cropping guides within the viewfinder do not change with each lenses. It's also not focussing correctly.

Can anyone fix these problems in the UK?
I recall someone posting up a "fix your focussing" indepth detailed step-by-step guide but I am unsure where it is on her.

Thanks
Tim