Main dealer told me my Peugeot tyres needed replacing offered to do it at £100 a corner. Looked up the price and they were £20 ish each from Blackcircles. I had a Premium brand on the car (Goodyear) at the time and asked him why were they not offering to change for another premium brand, or even Michelin which was what the car was specified with - he didn't really understand my point. They got a 4 on the customer survey and I was called by the Dealer Principal on that one.
Another time, same customer agent, I fell for the water in the brake fluid, so had it changed for around £40. Car had to go back in 3 months later for more work. Was advised I had water in the brake fluid. That was another 4 from me. Citroen/Peugeot called me this time.
I like Peugeot/Citroen cars, but would never deal with that main dealer again.