Alternatives to Stripe?

I posted a few months ago how our Stripe account is a victim of card testing attacks (https://news.ycombinator.com/item?id=35682534)

At that point, I was frustrated that they wouldn't address the situation. I had contacted customer support numerous times only to be put on the back burner. It was only after that post that Stripe reached out to me and the problem seemed to damp down for a little bit. Now, less than 3 months later we are experiencing the same issue yet again. Lots of new "customers" that never visit our website but end up signing up for a subscription. Every new customer that signs up we have to manually check to see if they are "real". If not, we refund and block them immediately in Stripe. We missed one the other day and ended up getting a charge back. We reached out to Stripe and they advised us to accept the dispute, which we did. However, Stripe refuses to reimburse us for the charge back fee of $15. In light of Stripe's refusal to correct the problem and reimburse us for their mistakes, we are exploring alternatives for our subscription service. We already moved away from PayPal because of their hostility towards other businesses (though we never experienced any such issues directly).

What alternatives to Stripe exist? Stripe's own data suggest that card testing attacks on their network will only increase (see https://images.ctfassets.net/fzn2n1nzq965/Sfz8gaQMU7lsp0Ubd3w1X/84a4254625d05e1fbfe0117de34c1d62/Card_testing_sent_to_Stripe_vs_baseline_v4b_OL.svg?w=900&q=80

Thanks!