Disgusting service

Good day Pep I had this most shocking experience at your Pep stores in Athlone Cape Town . I came to do a paxi to send a parcel ,the cashier told me that they do not have any bags for 59.95 standard bag they are out of stock and I must take a bag for 3 to 5 days at 109.95 . My reply to this was it's not my fault that you do not have stock of the bag that I want to send my parcel and I would like to speak to the manager,the cashiers name is Abongile ,she spoke to the manager regarding the matter in her language that I don't understand and the manager responded to me through a window saying that I must go to another Pep that has the bag that I want because there is nothing he can do major attitude and then I asked his name he just scribbled it on a paper and gave it to the cashier to give to me not sure if it is the correct name The name scribbled on the paper is Bonginkosi Sizani please address this issue ASAP, I would think most likely an apology and compensation is due