What is the best Alternatives to Perfectmoney - Non refundable Payment Gateway ?
I suggest you check out bestchange.com, they have a list of possible exchange directions and most of these payment methods are irreversible. Off the top of my head i can list OKPay, Payeer, Epay, Advcash, and PM vouchers.
Though each have their own policies regarding chargebacks. Some officially will still allow chargebacks to happen but practically they will never answer support tickets, such as PM.
But in the end, i would still use BTC over any of these payment methods.