Unable to purchase Minecoins or extend Realm

After trying to buy Minecoins I get the error message: "We're unable to connect to Market place. Maybe check your internet connection?". When I try to extend my realm the level of subscription options and price doesn't appear. If I try to press the Extend for button it gives the error message: "Product not available for purchase. Please try again later."

I've made sure this is not a problem with my internet and gone through all the steps to update my NAT type as I thought this might have been the issue.

I have also uninstalled and reinstalled Minecraft and Microsoft Store as well as signing out and back in on Store and Xbox live to confirm they are using the same accounts.

I would really like a fix for this but even just an alternate way for me to extend my realm would be great.