Not satisfied with the experience I received

Not satisfied with the experience I received. I've done a online purchase on Myrunway app paid via payflex. They couldn't deliver my package because the item was defective from their side. So my order was cancelled. And according to Myrunway they send my money back to payflex. I was never refunded. It's been 3months. It's back and forth with Payflex and Myrunway. Payflex don't reply my emails and I can't reach them on telephone. Myrunway say it's out of their hands. I need my refund ASAP. As I received no item,for the money I paid. I'm very frustrated and unhappy.