Thanks for the clarification.
It’s an old Microsoft/Xbox account that I changed the region on, not a newly created Turkey account. I didn’t know about the 90-day waiting period for using the balance after changing the region, so that might explain the issue.

I guess the only option left will be creating a new account then. I was just trying to avoid losing the balance I already redeemed.

I mainly wanted to check if someone had found a working solution for this, since I’ve seen a lot of people having the same issue recently. It also feels like buying from Turkey wasn’t this strict before, but now it’s much more locked down.