Sleep Safe Gas Services in York

Under no circumstances would I recommend this guy - called in to service my boiler - never got a gas certificate. Asked him to fix my leaky taps whilst he was there - he tole me the parts he had bought were faulty which is why they carried on leaking and I got a water stain through my ceiling.
Came back to fix them and told me he had been given yet more faulty parts. After paying him over £300 I am still waiting for him to return - he won't return my calls or answer my texts.