Need Payment Gateway for Social Media Marketing (SMM) Business - High Risk Payment

Hi, we need payment gateway solution that accept social media marketing business (SMM) for our client. (High Risk Business Model)
Unfortunately so many gateway did not accept this kind of business anymore, especially Pay-Pal, Stripe, etc
But, there's another gateway that accept SMM business such as checkout.com , that most popular SMM websites use. But you need a 'special' connection, we have the contact but we are losing it.
Anybody know where we can get a contact or connection, so that we can use to integrate the payment gateway with our website, we are willing to pay more.
Or maybe if you got any other solutions?
We see so many sites in this business can accept payment with no issue using checout.com. But when we try to apply the same, the just ignore us. Despite our client website is not that bad, it receive lots of payment everyday, almost 0% dispute, and it kept growing.
Thanks.