Viessmann Access

Dreadful. A maze of applications poorly defined: "tools", "productivity" and other such rubbish labels. Choose any app and confusion persists: "the device" - boiler or thermostat? "Scan the QR code" - which bloody QR code? I've got five in front of me. "Your device is already connected to the cloud" - so what next? How do I access it? No word. If this is efficient Germa engineering, give me a bunch of clow ns, any day. Amateur clowns at that. Piss poor!