Disrespectful unprofessional cashier!

Hello there, I'm placing a complaint towards the ok minimark in Summergreens. My name is Yonela and I have been a resident of Summergreens for over ten years. I've been a loyal customer to ok minimark since it was still known as 7 eleven. Today I got into an altercation with one of the lady cashiers, who apparently goes by the name Florida(given to me by their night manager whose name is Drcee, excuse my spelling). What happened was, this lady is ringing my items, I bought a total of about 8 items at the store and I was paying with a debit card, however the cashier did not ring a plastic bag for me to carry the stuff in. So as soon as she hands me my card back i go on to ask where the plastic bag is? , she responds to say:she asked me and I did not respond, which is a total lie. I was having a conversation with my cousins who accompanied me to the shop, she could have simply caught my attention to ask me whether she should add a plastic bag to the items or not, which again was common sense, how I was I supposed to carry that many items without a bag? So because I couldn't obviously pay for a plastic bag using a debit card, I asked her to call her manager so that I could ask him/her for one, since she doesn't have the courtesy to offer me one when she's in the wrong. She shouts at me and says she doesn't know where the manager is, I can go ahead and look for him myself, she doesn't care. Things took a turn from there because she clearly didn't see a valuable customer in front of her so much so that one of the customers who were paying at the till next to mine offered me her plastic bag and I gladly took it. Things got physical with this rude cashier and profanity was thrown around. One of the cashiers went on to say "just go, get out of here, we are very tired can't you see we're tired? " simply implying that I shouldn't bother their colleague for a plastic bag that I obviously needed because she's tired. I left the store and went home to realise that I didn't receive my receipt. We(my mother and i) then went back to the store to report this issue because I didn't think of that right after that argument. We were not helped at all, instead they kept talking in their foreign language amongst each other (the night manager, the security guard who manhandled my cousins out of the store as well some of the cashiers). In the end we agreed to come back the following day, 30 September 2018, since the main manager, Peter , as they referred to him will be available to give us a solution to the matter and deal with his employee. I'm really not happy that cashier was very disrespectful. I hope that you can help me out, thank you.