I want something completely unrealistic- a company that does one thing and doesn't aspire to do more. No extra add ons 2 years in, no extra services, just do pa

I want something completely unrealistic- a company that does one thing and doesn't aspire to do more. No extra add ons 2 years in, no extra services, just do payments. Most of the conventional merchant services platforms do this, but they lack all of the modern-web polish that stripe and paypal and square have. They will happily take your volume on a cost-plus basis if you can handle the absolutely disgusting 1998 web presence and lack of docs, and often the antiquated API's that use SOAP and XML. They're great. They don't change. All payments API's are shit, but one that is predictably shit and doesn't change once you've dealt with the shit is a quasi-meta-good thing as bad as that sounds. You have a person you can speak to, they know you on a first name basis, and they do a single thing- facilitate your ability to process payments.