False and disgusting

Good morning I have downloaded the Uber eats app in order to make use of the discount for black Friday 24 Nov, the app kept on telling me the store is closed my intention was to go and check I got there it was open whilst standing in the queue the manager came around to manage the queue I then at that moment I approached him to tell him the error message I was receiving, his response was that they have an Uber eats machine and they switched it off because they will not be able to manage I was very disappointed and I asked him if could use the code manually in order for me to get the discount he immediately said that is not possible I need to just order as per normal because I traveled until the store I ordered as per normal, I waited until my order was done and I approached him again who said the Uber eats machine will only be operational the next day. The managers name is Selwyn at Belgravia Pedro's. I feel this is not fair which means that people cannot make use of the discount at a place where one wants to order because they cannot manage this does not make sense and I would like to be reimbursed as the discount was 90% this is disgusting and false advertising.