I will reiterate that we'd like to grow with any user we have (particularly a long-tenured one!). However, we can't support businesses with excessively high chargeback rates, no matter what. Keeping chargebacks at an acceptable level is a financial obligation for every business: https://stripe.com/docs/disputes/monitoring-programs.
So, we make it as easy as possible to submit evidence. The cardholder's bank decides whether the chargeback is won in favor of the business or not. The card networks are aware that "friendly fraud" is increasing too, hence the introduction of Compelling Evidence 3.0 (more to come on this): https://support.stripe.com/questions/how-does-stripe-support....
Is there a way in the stripe dashboard to see my chargeback rate? I think I’m closer to .1% than the .75% you said is a problem, but hard to know 100% how you are calculating it on recurring revenue.
With a SaaS, maybe try a trial period and monitor is the customer actively uses the service, and make sure you notify them before you start charging. Often I signup for a trial, find out the service is useless but forget to cancel. That first charge is a prime cb candidate.