Returned on the 23rd May from a fabulous cruise on the Marella Discovery 2. I had been monitoring any additional costs /purchases on my debit card, everything was accurate and up to date when we left the ship. However, on 24 May, £536.38 was debited from my account. Contacted TUI but they couldn't help since we had already left the ship. My travel agent is following this up but we have been home for a week now and this has not been resolved.