caddisaflysignhotmail.com review: AOL invoice

Received email with... Receipt no.[protected] re invoice no35175309.0002 saying paid by visa *85 on april 18 2023 (which I cannot trace).
Supposed to be payment for annual aol subscription, when they do not charge for their service personal payment for april 12 - may 17
Cannot trace anything from any of my card accounts.
How can I protect myself?
I am 85 and am worried about what to do.
Please help.
Ivor thomas [protected]@aol.co.uk
Tried to attach a photo but unable to do so. Information, as stated.