Hilton Hotels complaint: Charged Twice by The Hotel

This my email to Double Tree by Hilton regarding my complaint for being charged twice:

Dear DoubleTree by Hilton,

I have booked online and paid in advance for reservation number 3321571966 to check in on the 21st August 2023 and check out on the 25th August 2023. This is the only reservation I have made and was aware of!
I was NOT aware of the additional unpaid one until we reached your reception on the 21st of August to check in and the receptionist informed me there were 2 reservations under my name, one of which was paid for in advance.

I clearly said to your receptionist I DID NOT NEED 2 RESERVATIONS and asked her to cancel the extra one as I have not requested it and it was only my fiancé and I staying at your hotel for the whole period.
We then got the key to our prepaid room and the conversation ended there. I was not aware and was not informed by your staff that I needed to take any further action or to cancel anything myself. I would have never left a reservation pending with the risk of being charged and robbed of over £700!!
Your staff is surely aware of how things work and the training provided to them should enable them to assist customers with accurate information.

After returning home from our stay at your hotel, I have received a notification from my bank that Hilton Hotel had taken the money from my account.

I then phoned the hotel and spoke to staff and a manager and also spoke to Booking.com. Everyone seems to push me back and forth from one to another over the phone and one day I am told it can be sorted, another day I’m told it cannot.

I have now read tens of reviews on Tripadvisor from people who have been through this same situation, completely unaware of double reservations, probably due to glitches on Booking.comwebsite, who ended up being charged twice by the hotel. Utterly disgusting and clearly a breach of Human Rights and Consumer Rights Act!!!

I look forward to your swift reply.

Kind Regards

Wayne Llewellyn