I requested a refund 7 days ago, 1 day after purchasing the Map API professional license. I haven't received a response. Do I need to do something on my end first in order to get a response?

My original message:
I purchased the professional Map API license yesterday and would like a refund.

Reason:
I've been testing the API extensively in my ReactJS app over the last 24 hours. I'm experiencing too many bugs/errors related to incompatibility with server-side rendering to be able to use it in my application.

Thanks,
Michael