:-[Talleres Galindo in Mora
Last year I needed a new shock absorber for the ITV. I chose to have both replaced. I paid for 2 and saw 2 shining threaded bolts on the wheel arches.
A couple of months later I still had a problem and another garage said I needed a new shock absorber. I argued until I was shown underneath the car where there were clearly 2 different shocks with one a lot older than the other.
I had it replaced as I needed to do a long journey the next day. I challenged Galindo's  who claimed they had fitted 2 new shocks and just said (reasonably) that I should have gone to them as soon as I was suspicious.