Unable to cancel subscription of lost account

I lost access to my account(lost email access and password). I DM'd NextDNS staff on here, I also emailed sales@nextdns.io and billing@nextdns.io. It was been like 2 weeks and they have not responded. How do I cancel the subscription, or prefferably regain access to the account? I can provide verification of ownership using the following:

- provide a proof of purchase of the subscription(I have access to the card)

- Provide proof of IP address as I am still currently using the NextDNS server on my PC.