Firmware for a flsun qq-s using marlin 2.0

I have a flsun 3d printer that has issues I need the marlin to be fixed it has a skr 1.3 mainboard with tmc 2209 steppers it needs calibrated and set up as I dont know how too do the new version of marlin 2.0 plus im getting probe errors at random times during auto calibration I would be greatful of a price for this too be fixed this job needs to be a local person as it will require printer to be present