Hi William, thank you for reaching out.
I do apologize for the inconvenience but you should be able to access premium support directly from your BoldGrid Central account to cancel your subscription. We should be able to look up the account using the last four digits of the card you used to make your purchase.
This is a public forum and we only handle technical matters here but our premium team will definitely assist you with processing your refund and cancelling your account.
Thank you.