Subway in Midlothian

I entered the shop and waited a long time to place my order. I asked for a wrap and a portion of potato crispers. I was told there weren't any wraps available. I then asked for wholemeal bread and the assistant produced a different bread, informing me in a very gruff manner that it was the only type of bread they had left (this was not that late in the day). Once my sandwich had been toasted I was asked what I wanted on it. I asked for lettuce, onion and olives. I was informed that there were no onions available. I got to the checkout and my sandwich was handed to me. I asked for my portion of potato crispers and was informed that there weren't any. I asked why I hadn't been told this when I placed my order, and just about had my head taken off by the young female on the till. She shouted at me "Because it wasn't me who served you!!" I was absolutely stunned by this. However, I attempted to pay for the food I had received only to find that the little madam had deducted my Subway points to pay for it, which I hadn't asked her to do and hadn't wanted to do. I wasn't offered a receipt and I was glowered at. It was honestly a disgrace. I made a formal complaint to the head office and received a response asking for more information. I responded and haven't heard a thing since, which shows how disinterested Subway are when it comes to customer service. I won't be back.