Bad store management and cashier service

Yesterday the 19th June Wednesday I got treated very badly Bad cashier and manager service as manager was standing there saw and heard everything how the cashier treated and spoke to me and done nothing about it as I was twice in the shop in one day I stood in the cue as narmaly when it was my turn I paid to send a paxi parcel as I paid the cashier said she wants to first help the person behind be but rude at me from the beginning I said to her no iv just had a huge operation and i have lower back spinal injuries I stood in the cue she must help me finished she started to get a bad attitude towards me then so I got my paxi bag she said there go put your own parcel in bag move and go stand the other side so I did I put parcel in bad but I couldent close bag I was battleing she said no I must do it I told her my nails are broken I'm un able to pull the sticker off can she help me she screamed at me and said she's not allowed to help me eventually she done it I told her I'm going to report her to head office infront of the shop manager as she was not doing anything about it just standing there looking very rude aswell as I was a customer I walked out came home phoned head office.