Howdy Steve,
We can definitely get you a refund if that’s what you need. We process all refunds via email to maintain privacy. If you would not mind sending an email to support @ this website with your order number we can go from there.
However, you say you need a multisite solution. Does that mean you want a multisite license? You can upgrade from your current license to a multisite by logging in here, and going to My Account > Licenses and clicking upgrade next to your license. Would that work better? It should be easier and still be the same cost.
Cheers!
– Brook