Tado no longer gives out instructions - Underfloor heating

I just had horrendous product support.

i bought a new thermostat to replace my existing underfloor heating thermostat and tried to get a wiring diagram, providing model numbers and manuals (xstat and flureon).

firstly, even though they are replacing existing controllers they would not give me a customised wiring diagram.

secondly, they don’t seem to have any generic wiring diagrams showing how to wire underfloor heaters.

anybody else experience the same or know the answer to the above?