To think my thermostat is a complete bastard?

[GissASquizz]

Heating has packed in. The thermostat won't click. It's Christmas fucking eve you wanking knob end

Can you switch your heating on to 'continuous' at the boiler rather the boiler and pump being switched on and off with the thermostat?

Also check the electric circuit that runs your boiler/pump hasn't tripped at the fuse board (consumer unit) in your house.

If its a turny knob then take the circular casing off, sometimes the wire disconnects from the knob.

Have a look on the boiler as often you can turn it on and off there.