Auralum Automatic Tap Sensor Faucet Washbain Kitchen Sink Infrared Faucet Mixer Tap

I may have to return this item as the hot water flow is very feeble and won't stay hot unless we turn the cold off at the isolator. Plumber can't work it out.

Purchased this sensor tap and the hot water has stopped working. Had several plumbers out and they 're all saying it due to the tap. Not happy