Well I closed off the issue with an email to the shop yesterday as we were clearly not getting anywhere.
My view was that the advert said Schwalbe EVO Tubeless ready tyres and they supplied Performance tyres that are not tubeless ready. I saw this as a significant change and the shop didn’t. We were never going to agree so I will just have to accept it and they can accept the lack of my future custom.
They did not see it as in anyway their responsibility and offered nothing in the way of recompense. There you go.
Many thanks for all of the support here as I was beginning to think it was just me.
As an aside I am clearly in the market for some tubeless compatible 29er Rocket Rons and have a pair of crap Performance RRs to swap; pretty much the same apparently!!!!
Dogsby