Shoppers Drug Mart review: poor service!!!

They having promotion buy 100 gives 40 gift card ran off the gift card at the location I brought my stuffs and they told me to go any other shopper to get my gift card just give them mine rain check paper . when I am a ride at 100- 1323 Centre St. Nw Calgary AB T2E 2R5 the ( assistance manager named : Densie told me with a very mean void that is have nothing to do with her store because I am not purchase stuffs at her store. and refused to let's me re-dime my 40$ rain check . and asked me to go back to the store I purchased my stuffs. when I called back to the store I purchased the assistance manager said it should be ok to re-dime it at other store and asked me to give the phone to the cashier and I did. after they finished their conversation the girl asked me to return all my stuffs I have brought and re-purchase again and I am like what ? I already left my stuffs at home already are you expect me to go home and come back again ? from my home to their like 20 mins drive ( gas too cheap or what? ) and when my boyfriend asked them to talk to store manager they all said their store manager not here in both location. and at the end I got nothing just a fk piece of paper said 40$ dollars rain check and can not re-dime to a fk gift card. I am felling like scam when I brought stuffs at the first place I already asked are you sure you have the gift card and he said yes! after I paid he said Oh I am so sorry: " we're sold out of the gift card . we only can give you a rain check that you can go to re-dime at other location or come back here in the future time oh well he don't even tell me when should I come back . if you don't have it why don't you just tell me at the first so I can design to buy or not. ( the rain check only has 30 days to re-dime and they don't know when they will have that gift card again. which mean if they keep said next week and next week after 4 weeks my rain check will expire and a ha see you and gud luck ! I am very disappointed with this kind of customer service they called themselves managers and can not do anything Like it not mine business! I spend more than 100 today and got yelled at when I asked for what you guys promised. poor service ...! I think I am not gone believed in their promotion any more all scam and just is it you got yelled at when you asked for what you supposed to have ! that all never again !