Incorrect pricing.

On the 30th of January an app deal was loaded to my clicks clucbcard for Domestos 750ml at any 2 for R20.00 I went to the store to buy a few bottles as this was great deal to be treated like a fool by the store manager who asks me if I think this is a free store giveaway. This is unacceptable as I ha e screenshots of the pricing and expect to be served at the price advertised not what you've now changed it to. I have the pictures to prove this don't treat your customers like fools this is unprofessional.