Does it give you an error message at all when trying to link? If so, please grab a screenshot and we'd be happy to help. ^BT

Let's have our Support team take a look! To keep your information secure, please complete our request form at aka.ms/Minecraft-Support so we can quickly and safely assist with your question! ^BT

Were you able to make a ticket with our Support team? If not, I'd suggest doing that so our Specialists can take a look. ^BT