Accidentally purchased the wrong theme (I already owned it)

Hello. I accidentally purchased the wrong theme. I already own Oasis since January (it’s awesome), and I wanted to buy Rise (https://demo.appfinite.net/rise/).

Any way you can swap one for the other? Would be greatly appreciated, and would save us a few hours of development time on the home page for what we have planned.

Please let me know if you have any questions. Thank you!

~ Tom