T-Shirt codes not working?

So we got codes for t shirts like many others have, and we were going to give them out as a prize for students who got first place on a kahoot quiz. The codes we received however aren’t working, and we can’t seem to figure out how to redeem them. Any ideas?

Hi @nkomirisetti ,
I had a similar problem. I contacted the github support team who got back to me within a couple of days. After that the codes worked. I can’t remember the link I used to contact the support team. I am sure google will find it for you.

Same thing happened here. support@github.com was able to get them working for us.

how to apply this t shirt code ?