We were meant to be going to Mallorca on the 31st July 2023. Unfortunately, one week prior to flying I had to have an emergency operation due to an underlying health condition and we were unable to go. I rang up TUI and asked if I could postpone the holiday by 4 weeks. I was told I could and that this could all be processed online. I went online and transferred the holiday to 4 weeks later. I imagined that there would be some TUI fees to pay but how wrong was I. The cost of my initial holiday was £4.5K. The cost to transfer the holiday was also circa £4.5K making a total of £9k to pay. So basically a £4.5k fee. When booking the holiday initially, TUI would ring me for payment and send nice emails etc. When I needed something from them, my phone calls went unanswered and my emails (to a specific person) were not returned.