Failed payment process

Hey Indiehackers,

How do you manage the failed payment process?

We have reduced the trial period for MonitUp.com from 15 days to 7 days and made it mandatory to register a credit card to start a trial. We are trying this method now.

2 trial versions started but the payments could not be made. Would you recommend waiting a few days and ending the service directly? When you try to contact the customer, you usually do not get a response. How do you manage failed payments? What is the most accurate method?