Terrible customer service

Yesterday Morning i went to Dischem park station to buy laxatives. i then realized that i bought the wrong product so on my way home i decided to go the the Dischem at West gate mall. After waiting close to 10 minutes, the front-line manager told me that the dispensary manager advised her that they are unable to exchange the product as it was Medicine . I went to Dispensary and was told that Elizmarie (the dispense manager ) has knocked off and was referred to GIDEON VISSER the second in charge. I explained the situation to him and the response i received was shocking, firstly he was extremely rude ,he bluntly told me' we will not exchange the product as you have already left the store with it' i then tried to explain that i did not even open it or took it home and coming to that store was convenient for me as it was on my way home. What he said next totally ****ed me off, he said ' There are signs all over the store, why didn't you read them, when i asked why i was not advised why i wasn't told about this when i was paying he still said' no one will tell you, you must read the signs'. i still dont understand how your store would not exchange a product i bought on the isle, it was not a script that was bought over the counter which was still sealed. Worst part was when he told me if i have an issue i should take it up the PHARMACY COUNCIL!!!!!!! Are you freaking kidding me???? Do you have any idea how much money i spend on your stores to be given such pathetic service by a senior staff member? Do you even train your staff members on how to treat your customers. I'm beyond disgusted by the treatment i received yesterday and if he explained to me politely about the procedures , I'm sure it was going to be a total different story. I'm beyond disappointed in how i was treated by a SENIOR staff member that is supposed to live by the values and understand what client service really is.