I have that branded card and I haven't for the life of me figured out how to use my rewards to pay the MF. I can pay the MF with the card, but then the rewards just sit there. The hyperlink goes over to a Wyndham Rewards site but that has zero to do with the rewards on the credit card.
Okay...the rewards points you earn by using the Barclay Bank Wyndham credit card should be reflected in your points balance when you log in at the Wyndham Rewards site. If they do not; then there must be a problem with the credit card being associated with one Rewards account while you have a different Wyndham Rewards account obtained at a different time.
When I first got my Barkley Wyndham credit card I had a problem because I had an old Rewards account that they could not connect with the card and I had to use up my Rewards points in the old account and then just log in using the a Rewards account number associated with my credit card.
So look at your credit card and see if the Rewards account number (the number embossed below your name on the card) is the same as the Rewards account you are finding no association with.
When you are logged in to the correct account, you should see your total points in the top right corner of the page. You can click on your account number at the top right to get a page with your account details. Here the section from mine that shows the points gained from hotel stays, special promotions and "Barclays Spend" and "Barclays Earning", which is points from the credit card.
After you are in your correct Reward's page and have enough points to send to pay Wyndham fees, look for the Redeem button near the top of the page. Click Redeem and
scroll to the bottom of the next page to find this second "Redeem" button:
Ha ha!
That Redeem button will take you to a page where you can select your next "Redeem" button. I haven't done it, but I think this page is the one you need right there the very first Redeem button: