August 1st, 2020 and I just had the same issue. I thought it was weird and starting looking into it and sure enough its a common theme. The payment was taken and they did not deliver the product, as if the checkout page wasn't already overly complex. I ended up paying for two programs and now I cannot cancel one of them. This is such an ironic situation that developer.apple has such a horrible user experience for developer program enrollment. I would love to just say sorry apple and users, no iOS app for you!