Musescore Pro Refund

Months ago (Summer 2020), I used the free trial to download a couple scores. I forgot the trial had expired.
Today, I was charged $50 when I haven't used this service in months. I would like to request a refund.
I don't need the Pro account and will not use it. I have contacted support and they are unresponsive.

What might I be able to do to help move this along?