Bad experience at markham daveyton mall

I went to buy clothing at markham daveyton mall as i usually do , to my surprise i was approached by an employee , chubby light skin . He told me i could get a discount on jeans if i purchased more than i had, at the time my budget was low but cause of the discount he told me about i went for it as i am also a businessman. In my thoughts i was thinking he'll use a staff discount, so i was given these jeans with no slip . I left the store and shared with friends what happened then people wanted to buy from me, i sold a few items then got caught by the security officers from the centre. I stated clearly that i got the jeans from the store and they were aware , i got held roughly as they were not sure until they called the manager of which she also denied but i fail to understand why these items didn't beep at the door as i went out but the guy helping me took them out at the till . This was a bad experience at markham daveyton mall wrongfully done by the staff, till today i dare not to set foot there..I'd rather go to truworths where there's a security officer at the door who will vouch for my statement.