Poor support

I have been trying to add a camera using plug & play with a QR code, this app constantly locks up and will not let me set up this camera, I have deleted the app and redownloaded it and it still doesnt work, I have set 4 emails for support and not one has been responded to. And now that Foscam is now Amcrest this app wont work with their cameras

normr about Foscam Pro: Multi IP Camera Viewer, v3.911