What a good approach to take is simply to approach other businesses with models similar to yours and ask them who they use and get an introduction to their contact at the merchant account provider. If you're working with someone at the provider who's already familiar with your business type then things will move much faster.
If the person you're dealing with has never worked with a company that's does SaaS subscriptions before then naturally you're going to have more problems.
Chargify even lists specific contacts at BarclayCard and HSBC for people looking to setup merchant accounts that work with them, and because Chargify direct all of their users to specific contacts it means these individuals are extremely clued up about the SaaS business model and the process will be a lot less painful.
If the person you're dealing with has never worked with a company that's does SaaS subscriptions before then naturally you're going to have more problems.
Chargify even lists specific contacts at BarclayCard and HSBC for people looking to setup merchant accounts that work with them, and because Chargify direct all of their users to specific contacts it means these individuals are extremely clued up about the SaaS business model and the process will be a lot less painful.