Shown the door

Me and my friend walk in pep with a plastic. A security guy told us please leave your plastic here we told him we wont be coming to that side when we are done as the store has two doors as we walked in the manager saw us and told us rudely to turn back to the door even shouting at us to go back my friend had his lunch box bag was told it okay I asked my self a question what was wrong with the plastic I had but my point why would I leave my plastics by the other door when I wont be coming to it but for that I was chaeed out off the store regardless of whether I was the for business or not, in that moment I felt like a *****