There is indeed a much better service than Pagbank (formerly PagSeguro). It would be Asaas, which provides several features, several payment methods, and allows you to send messages via email, SMS, and WhatsApp through their own platform. Pagbank create and update new API, but you could choose between one or the other. However, we ask that if you choose Asaas or PagSeguro, you leave all payment methods enabled, as we now have 4 payment methods: bank deposit, pix, credit card, and bank slip. Here are the documentation links, but I would prefer you to give preference to Asaas, as it offers many more features:
Pagbank:
https://developer.pagbank.com.br/
Asaas:
https://docs.asaas.com/
I leave the two options up to you to choose from and atencion you to look at us a little, because what I notice is that in your system you have several gateways to the United States itself and other countries, but we have to use what you have and not what we need.