I would expect to see that at B&Q or Screwfix, etc, less so at the wholesale outlets.The wholesaler my mate works at have a rule of not offering any advice other than suggesting alternatives to something they have been asked for to avoid any comebacks on them
After being told by my mate what is happening I've had it confirmed by a couple of other wholesalers they get similar requests for advice on how to do jobs from supposedly qualified "electricians"
The ones I deal with are quite good at letting you know if there are new or related products around, also sometimes on ones to avoid due to high returns (a few of the guys working there are ex-sparks I think), but I am sure they would draw a similar line about offering advice and actually doing it!