Poor Customer service

This morning after calling builders express to enquire if the had 9kg gas. I was informed that they do.But don't accept orange gas bottles. I explained that the ones I had were green was told that was fine. So I drive to the store. Carry the two empty bright green bottles in first past security and then to the customer service desk.all in full view of staff. The lady at the desk said the bottles were fine. We needed to purchase paint and other items. And was told that when we pay we can pay for the gas and they would bring the full bottles. Once we had paid for the R700 of other items then and only then were we informed that no they dont accept the bottles. Needless to say I was not a happy customer. What I don't understand is how all the staff that we initially dealt with did not know that they did not accept the bottles. Instead they watch thier customer carrying these bottles around and dont say a word. Does it make a difference if I say that I will in future go to mica , no, what do you care if you loose one customer. But with the service and attitudes like the ones at your Norwood store should concern you.