CVS review: Did not give me advertised discounts

Went to your store got my d3 5000iu got 2 said buy 1 get 1 free and sone nighttime cough syrup buy 1 get 1 50% off. After checking out with my healthy benefits card they ripped me off and said the manager said to stop giving card discounts with a benefits card! Nothing is said on the sale sticker! This is false advertizing and discrimination! Also was not given my receipt probably because I complained but its on my benefits card statement!