Go to your account page. It will say when the account was created, 20 march 2002, as example. If you paid each month, then your can just add them up, and see how old your account really is. Then log in on the first charater you made on the account, and look at profile, it should be the same age.
If not, post the age difference and the info, and send it in to EA. If they start getting a lot of complaints about it, they might do something.
This of course begs the question, "Are Vet rewards a Right, or a Privalege"?