I have been trying to upgrade to pro, and it is giving me the "Default Payment Method was not accepted" error. I have changed my payment method to 5 different cards and it is the same response each time. I have already opened a claim with a support ticket, but the response was that typical wait times are at 1-2 weeks right now. I am at my limits and need to upgrade and waiting upwards of 2 weeks will for sure hurt my website and productivity.