Nextdns Auto Payment Decline Bug

Hey Nextdns Team , 

I am very happy utilizing your services for the past 15months.

Recently i found out that the payment system has a flaw,if the card used by the user is no more active or for any reason the auto-payment fails, the nextdns premium keeps getting renewed automatically for three days.

I feel like once the three days are given , the premium should be disabled as people may misuse this functionality and it may cause revenue loss.

As of now i guess it keeps going into infinite three days renewal try.

Thanks