Payment gateway integration (Vendo and EPOCH though aMember)

We have a WooCommerce/Wordpress based website where costumers can buy digital memberships with the option of it being recurring. Our payment providers are Vendo and EPOCH and we work with an aMember integration. Currently our costumers aren't able to choose between Vendo and EPOCH because only EPOCH is shown. The aMember support hasn't been any help and now we are at a point where we need help.