I don't do a lot of work for RBG, only because they don't have many shops in my area. But I've never had a problem with payment from them. Sometimes it shows up sooner than I expect. Wondering why you haven't followed up, apparently, since May, though. Anyway, sounds like others have given you good direction on how to contact them. If your shops are pending payment, then there could be some glitch with your payment information or something. Good luck!
I learn something new every day, but not everyday!
I've learned to never trust spell-check or my phone's auto-fill feature.