Very disappointing Uber Eats experience

I ordered food on the 2nd of May 2021 from Uber Eats. When the order arrived I saw some items missing and I logged it with them. Afterwards I realised even more of the order was incorrect and logged that too. At this stage they didn't want to refund me anymore, saying that I already got one refund.

They also don't accept my email address not realising that for my my own security I have different emails registered for each company and I cannot send an email from the registered email address.

I am very disappointed in the customer service I received.