Programmatically change Payment Methods WooCommerce

I am trying to programmatically manipulate the selection of Payment Method between BACS and a No Payment required option. My client wants the ability to Request for Quote only, so I’ve extended woocommerce actions and filters, and provided a method to request quote through the cart system. If the user has requested a quote only, on the checkout page I am trying to auto select the Cash on Delivery option, which I’ve renamed to “Request for Quote Only – No payment required”. Any advice would be helpful.