Disrespectful, unfriendly

I wanted to make a purchase at the Game store in Canal Walk on the 03/05/2025 just after eight the evening, myself and my husband wanted to purchase a Epson printer, the gentleman that assisted us in the department was absolutely amazing, however when we went to the till point to make the payment for the item wanting to use the PayJustNow payment method, the cashier named Zena Mackay what a unpleasant and extremely disrespectful person, firstly she didn't greet at all she only asked "cash or account" and I said I'll be using my PJN, her not even acknowledging what I said, she proceeded to ring up the item, she then bowed down her head and scrolled on her phone not even saying a word or even directing me or showing me where to scan the QR code to complete my sale, I then asked her what should I do with a irritation in her voice and shouting voice she said "scan"! I said to her well you didn't explain or show to me what I should do and secondly you do not shout or raise your voice at me, I asked for the manager sarcastically with an attitude she called the supervisor(I highly doubt she was the manager)the manager listened to what I had to say and while I was explaining the cashier laughing and even denied even though I look at her whilst she was she antagonist me in such a manner that manager asked her to get up and leave the till point, as the cashier got up she mumbled words and I couldn't hear what she was saying but facial expression and body language spoke for itself. I could have purchased the item at any other store as there are plenty competitive store but I chose Game, I eventually ended up not making the purchase, incidents like this should not even happen in stores customers should be prioritised at all times and respect should me shown to all races and class.