on Tuesday I went into a very large electronics store and wanted to use a coupon that gave me a lot of money off of the final bill if I used my credit card. unfortunately when I got there, and after I shopped for like an hour I went to the register and got abig surprise. They told me that they would not honor the coupon because they said there was a typo error. They didn't have any signs of anywhere in the store, no signs on the front of the building and no message anywhere online. I think this is bait and switch. is it? Can I do anything about this?