How to delete second accout

Hi,

I somehow have now got two accounts at booking.com. I have tried to delete one and use my other email address to access the account I want to be active. I get an error message saying the email address is taken.

When I attempt to use the help page I just go around and around in circles ... it has become very frustrating and very time-consuming.

I have been using booking.com for years and want to get back to my Genius Level 3 ... please.

Thanks,

Bob