Purchased Wrong Subscription

Hi,

I purchased a Zoom Room monthly subscription three days ago.  I noticed that I was still only able to host Zoom meetings for 40 mins, like the basic package allows.  I later realized that instead of the Zoom Room subscription, I should've purchased a package that allows me to extend the meeting time.  Hence, I cancelled my Zoom Room subscription and I'm trying to purchase a Pro subscription.  However, I'm not able to.   Whenever I choose the Pro subscription, it doesn't show up in my cart.  Is it possible to purchase a Pro package after purchasing a Zoom Room?