Hello from Slovenia, After a little less then a month of going back and forth with apple support, trying different things and struggling with issues regarding buying the account, today i finally got it resolved. Here is the story: At first i enrolled (tried to) through the web, I didn't even make it to the payment, I tried two different apple IDs, same thing. Then I reached out to support and they've said to enroll through the app. Again, couldn't even provide my ID images (unknown error occured) again, I reached out to support and they sent me a link to upload the IDs through the web. They manually authorized my ID and I was able to get to the payment stage. When I tried to pay, again: "Your purchase could not be completed, purchase failed an unknown error ocurred, etc. Again I reached out. Turns out the support made a typo in my surname, but still couldn't pay. Again I contacted support and they called me. Then they transfered me to Itunes support. I called them and we were on the call for 40min. They couldn't resolve it so they said the issue will be passed to higher developers or something and I had to wait for 24hrs and try again. I've waited and tried again and it worked. So to sum it up: Stick to one apple ID (probably the one You use most) Use the same device for the whole enrolment process use the apple developer app keep contacting apple support as the problem is probably on their end I also used Revolut for the payment DONT GIVE UP, try everything, reset your iphone, remove all payment methods, add them back, try different ones, update the iphone and all apps... Hope this helps someone