I booked tickets to go do a Christmas lights trail with friends and family and managed to book the tickets for the wrong day. I realised straight away and email them last night and call them today to ask to change for 2 days later ( tickets still available). They refuse to do so, I am so upset, I can’t go on that date and neither some of the other families. The tickets are non-refundable. AIBU to think this is really poor customer service especially for a Christmas event not even sold out yet? Is there anything I can do ?