Accidental service charge after free trial

I took a trial subscription a few months ago, But I was infected in this COVID-19 pandemic situation and I couldn't use the facilities of Linode. In that time after 3 months today, it automatically took $30 from my payment card. I forget about the subscription and auto-renewal enabled.

I'm in a very poor situation nowadays that's why I want refund my money in these circumstances.
Hopefully, I'll use your facilities later.

You're most welcome to refund my money and close my current Linode account.