Shoppers Drug Mart review: cosmetic manager being rude and not abiding return policies

I purchased a cosmetic product from the Lawrence location yesterday 1st April, 2019 and that did not work for me so i decided to return it to the specified location of shoppers which was nearby. When i spoke to the cosmetics department manager there, she did not even bother to look at my receipt or understand that i wanted to return the product. She blatantly told me that every shoppers location is different and we do not accept returns from the drugstore side of the store. This was utterly shocking for me and on top of that she said, " go return it where you bought it from, we won't take it!"
Working in in the service industry myself, this was totally unprofessional and rude and if this is the way associates treat you, it sends a very negative message to the client.
I am very upset with this behaviour and i felt judged upon by this incident. I request that some strict action must be taken about this so that it is not repeated. I would want to know what action will be taken.