Ford damage my Ford Everest

The FORD THE GLEN is the most useless dealer in the country, I took my car for Service on the 8th July , 9th of July came with the error (water in Fuel Drain Filter) and the car died , I cant move .now they are blaming the Engen Garage where I poured in the diesel 8 day prior to taking the for Service , Ford is refusing to take responsibility of fixing the car .