How do I claim bitcoin from an old wallet?
From your earlier (now deleted) comment, I think this is your address: https://blockchain.info/address/176T2BxKAraEnusvuuK48RPA5yVYQRhMdc.

You need access to the original wallet with which you received the bitcoin. Which wallet did you use back in 2015 and 2016? Can you still access it? The "Request Payment" button is for sending more bitcoins to that address, not for spending the coins that are already there.