@Steve2848
We've had guests who inadvertently put the wrong phone number in their profile, or change it some time after their initial sign up.
Some guests just don't respond. Often until the very last minute, because they suddenly realise they haven't a clue where your place is, or how to get in.
In any case, it often ends badly for either the guest or the host or both.
You should inform Airbnb... although it won't likely result in anything useful, but having it on record may be valuable later on, if the guest accuses you of "not responding" and wants a refund.
Good luck.
By the way, I'm from Southend, originally... 🙂