If a company doesn't allow duplicate contacts, when a contact enters the database, it first checks if his phone number exists in the database, and then secondarily searches for the email

Let's say I'm a prospect who's been in the database for a long time. I have a specific phone number, and when I signed up at that time I had an email.

Now suppose I make a request. I will fill out the form with the same phone number, but in the meantime my email has changed.

I expect to receive notifications on the new email address, the one I've completed the form right nou, right?

But the problem is that all confirmation emails will come to the old email address. The explanation I found is that the phone number is searched for, it exists, it doesn't create a new contact, but it doesn't update the email either.

It should update the email, this is the problem.