OK..
(redacted),
Thank you for your email, and we appreciate the support and pride you exude for the Bills. I'm sorry but unfortunately we don't have any control over other teams using one of our jersies in their memorabilia case. I have forwarded your email along to the Giants to take into consideration, but it is up to them whether or not they take it down.
Thank You,
(redacted)
Customer Service Representative
Buffalo Bills