Customer Service in Brazil. What have been your experience?

Customer Service. Is Brazil preparing to go to the next level? So far, between the expectatios and the delivered there is a huge gap. I have experienced it with different companies, from Consul to Porto Seguro, GVT, Vivo to the electricist picked from the news paper add. I think to start, these companies should not promise what they cannot comply with. This would be a great start. Not mentioning prices, they charge you 50% of the air conditioning price to install it ( a not complex one). This, when they honor you with their presence... Idiossincracia criola, this is what a friend use to say. Others will say, "os brasileiros estamos ferrados"... The sad thing about this is that a bad service after sale can threaten all the effort put in the factory, to produce with quality and the sales people who sweat their shirt to close the sale.