Cancelled Subscription and need to "unauthorize" that company from access to my PayPal account
I have just cancelled my VPN service that I evidently authorized (a year ago) this company to bill me annually through PayPal. My refund from them to my PayPal account is supposed to come within the next 7 days. How do I take the PayPal "authorization" away from this VPN service, so they cannot make an unauthorized charge to my account whenever they feel like it? They told me they won't, but that's not good enough for me.