First sign up for a subscription with a live card make sure signups are still working properly. Setup a plan to renew on a live card tomorrow, make sure that's

First sign up for a subscription with a live card make sure signups are still working properly. Setup a plan to renew on a live card tomorrow, make sure that's working. Setup tracking on which users visit your cancellation page but don't cancel. Setup a page to view this in your dashboard. Email each one personally and ask them how their experience is going see if they have any questions or have suggestions to improve your app make it more valuable to them. Adding a required text box on the cancellation page asking why they are leaving is a good way to get feedback. Personally email every user you can, start with cancellations say "Just reaching out to see if there is a reason you cancelled and are there any improvements I can make to make the application better? Any feedback you can provide would be appreciated". Next email new signups to see how their experience is going. Check all your domains, browse through your funnel make sure signups are working nothing is broken on the site. Test out your app run through with a new account as a user and make sure things are working properly. Check error logs any issues users could be seeing. Check your traffic, organic search rank and make sure you haven't fallen out of favor with Google. (Investigate your typical traffic sources/analytics). Add code to start tracking logins, how users are using your SaaS to see if you can see which users are active or maybe active then drop off. Follow up with them see if you can help. Good luck turning the ship around.