Used Vodafone VeryMe discount which applied at checkout but the notification from Monzo was full price, as was invoice. I was cut off by one customer advisor (Julie) and I then reconnected to another (Zoe) who told me that she had raised a complaint and I would be contacted within 72 hours, she cut off the chat and I reconnected because I hadn't recieved a complaint number. Another advisor (Mulakala Harika) informed me that Zoe had not escalated to supervisor and had therefore lied and he apologised. Mulakala Harika told me he had escalated it and I would recieve a phonecall within 72 hours and ended the chat. I replied saying I had not recieved an e-mail and was connected to another advisor (Sayeem) who advised that a complaint had been logged and the reference was 68573713. This was all very time consuming and advisors tried to avoid honouring discount despite being sent screenshots. The order itself wasn't expensive (£18.70 and I was expecting 25% discount) but the customer experience was horrendous. I should have just collected from the restuarant direct, which would have been cheaper, as JustEat will do anything to avoid honouring discount codes, including fobbing off and lieing to customers.