Yes, I'm always here to help, i see you emailed 40 minutes ago. We typically reply within an hour on work days.

I see that most of your QR codes work but some don't this is because of the colors you've chosen + the logo is quite big. What you can first do is try to increase the "Error correction" in the Quality settings, this will probably solve your scannability issue. If not you can try and make the logo a little bit smaller with the slider.