If the manager found the discounted price on line before he rang the Corporate Division, well then that should be adequate proof that an offer was in place and that you had already accepted that offer. In fact, the manager was authorized to confirm the sale on behalf of RL and so he should be sufficient confirmation that a sale was already in place. The effect of their online offer and your acceptance is a contractual obligation to deliver on the original terms offered. The argument that their IT staff screwed up is not convincing. If my sales staff offer to sell items to the public by mistake, I remain obliged to meet my company's obligations regardless. My remedy is to educate my staff properly, it is not my remedy to breach my contractual obligations. It is one thing for a consumer to be reasonable with retailers, it is quite another to expect consumers to allow breach of contract in circumstances where the retailers would never tolerate a breach had the "shoe been on the other foot" - pun not intended.