Apologies for your frustration with this issue. Unfortunately, I have not seen a solution for automated payment - even through all of the forum posts I've seen. There's one post that warns against automating affiliate payments (Affiliate not receiving commission
. One of the posters indicates that Paypal pro has an API that you can setup for automated payments directly through Paypal, though at the end of his post, he suggested that payments should be made manually.
The only other solution I found in search is still incomplete, and I have no idea if it will be finished (plus it was only listed for 1.4x versions of OpenCart). So at this time, I would have to say that there are no solutions for this issue at this time.
If you have any further questions or require further assistance, please let us know.