I am experiencing the same issue. I am an Agency Basic member and would like to upgrade to Agency Plus. I have already tried several cards to pay (some are mine and some are my partners, all of which are visa debit cards- not virtual cards or gift cards) but nothing seems to work. Please help me with this issue. I am really hoping to do business with Upwork and many future clients and freelancers.
Hoping for your kind and immediate response.