False advertising online

This is now the second time that I do online shopping through them and both times I get sent an e mail to say that they have cancelled the order. No reason for it just "order cancelled"! What a lot of B*LLSH*T!!! They do false advertising on prices and then when you try and buy from them there is always a stock problem. They do not explain why prices on the so called sale are not honored by them. Very eager to take the money when you pay online. Please catch a wake up and upgrade your system to decline your purchase before you pay if there is a problem and not 2 to 5 days afterwards. I know of other people who also had the same problem with buying online.