I need an iPhone app. I would like it designed and built. i am an international seller, but the application- Mercari will not let me post my listing overseas even if I have a VPN with US IP address. What should I do? It will let me post at the beginning ( one day) and then now every time I attempt to create a listing, they will say your location cannot list anything. Can someone help me solve it so I can sell it overseas again?