Not treated with any respect

I bought a Steri Stumpie and 3 Berrocca boosts and was not given a receipt. At the door the security guard wouldn't let me out without a receipt. When I told him I did not have and tried to leave, he blocked my path and told me to go to the manager if I had a problem.<br> I walked back to my till and the lady told me she had given me my receipt with my change. Upon showing her that she is wrong, she told me she threw it away. She then lifted the bin to and told me to look for my receipt. I told her I won't put my hands in the bin and that she can see I am carrying food (not that it's right to ask me that). She then dropped the bin and I then told her colleague to call the manager.I was then told that the manager is \receiving"and that he can't talk to me now. One of her other colleagues went through the bin"