Faulty suspension after workshop visit

Hello friends, after a usual workshop visit with my Susi, VL 1500, year 2002, after 80t km following error. The suspension of my telescopic fork is practically to zero, i.e. I have almost no spring travel any more. unevennesses of the road beat up into the joints, some say up to the biker brain, through. Before the spring travel was too long and soft, the fork oil was changed. Lt. invoice per fork 439 ml. Before I now have to complain I know what I am talking about. demand an explanation for the sudden behavior? Friendly greeting Muggn1