Get $10 to use on your next coffee order - Xfinity Rewards

I received my gift card fine.  I manage my parents account since they are elderly and not very technical.  I went to redeem theirs on the reward site.  Everything was going fine.  However, when I submitted it from the xfinity side, everything went okay.  However, the email link that goes from Fandango gives me an error saying I reached the offer limit.  They stated it's one per person.  I told them that it isn't for me and I'm redeeming for my parents.  However when i submitted the second form with their redemption code, the browser prefilled it with my email address (even though we have different emails for xfinity services).  Is there any way I can get this gift card?

We've suspended your submission as our records indicate you've reached the offer limit for this promotional program. Please refer to the offer details for more information concerning offer limits.