I solved this problem by using another browser. I've been using Chrome to enroll, but customer service suggested me to try Safari. It might work for you too
dava_developer
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I am from the US, and I have the same problem. Payment doesn't go through; it says "www.apple.com refused to connect." Now, I am just trying to contact apple customer service to solve this problem. If there is anything else I could do, please tell me.