Shocking service and business ethics

My husband has spent a good +-3hours at the store trying to purchase a hifi system that was advertised in the Game catalogue. The staff are trying to sell us a completely different model from the one advertised.Asked to speak to the Manger who told us taht he could see no difference in the models and was still trying to palm off a cheaper model instead. Eventually got told that we must callthehead office ourselves as there was nothing he could do further. This is disgusting service .Feel sorry for the blokes that have been ********** and given the cheaper model instead.