REFUSAL TO REFUND A TRANSACTION!!! PLEASE ASSIST

A transaction was made on my card for a hotel in The Netherlands last year September, IT WAS NOT ME. I had no reason to book a hotel in Holland, I wasn't going there, I didn't look up hotels, just No reason at all. I filled out a DISPUTE FORM, received a case number, only to be told Tyme will not refund the amount, because I got an opt number, and pushed go ahead, which I also did not do. I went to the bank ombudsman, they said Tyme bank higher managers must sort it out. They can go through my phone records, search my laptop, I did not make this transaction. Tyme bank , I would like the refund please. I will do what I have to , to get the refund. It's alot of money for me to lose.