T
The Ghost
No ganging up, promise! So from the few pics you supplied, agree with others on here the install standard is apprentice/DIY level. Did you or the contractor do the plastering (bonding) around the sockets? Anyway it is really hard to advise on what to do exactly as questions will arise as to what sort of supply you have and what is supplying what at your fuseboard. But if you can help us to help you we should be able to advise on a likely course of action and perhaps a ballpark figure for the work. I am genuinely sympathetic to your bad luck in getting two in a row non completers.
So I think the supply to the boiler would have a FCU next to it for isolation. And agree the cable to the boiler ideally would be replaced from the consumer unit. I note you have two Switch fused connectors adjacent to a socket and unless they are separately supplied from the consumer unit I would have to do something about that. The cable draping up the wall on the new bonding coat needs to be buried and oval conduit in the wall with it. So pictures of the supply end showing the "fuse box" and all the supply gubbins could be good to show whether you have RCD protecting the circuits in the kitchen. What about lighting? The last time I charged over a grand for a kitchen is when it was done in galvanised steel conduit throughout. I just say the above to provide another point of view which confirms the consensus. We do get people on here and they talk of a fictional electrician while in truth they are doing the work themselves seeking professional advice on how to complete their botched work. So unfortunately you might have to deal with some skepticism and or "checking" on your credentials.
So I think the supply to the boiler would have a FCU next to it for isolation. And agree the cable to the boiler ideally would be replaced from the consumer unit. I note you have two Switch fused connectors adjacent to a socket and unless they are separately supplied from the consumer unit I would have to do something about that. The cable draping up the wall on the new bonding coat needs to be buried and oval conduit in the wall with it. So pictures of the supply end showing the "fuse box" and all the supply gubbins could be good to show whether you have RCD protecting the circuits in the kitchen. What about lighting? The last time I charged over a grand for a kitchen is when it was done in galvanised steel conduit throughout. I just say the above to provide another point of view which confirms the consensus. We do get people on here and they talk of a fictional electrician while in truth they are doing the work themselves seeking professional advice on how to complete their botched work. So unfortunately you might have to deal with some skepticism and or "checking" on your credentials.