No EIC issued after rewire

Only the Original Installation Electrician/Contractor can supply you with an EIC. The workaround for this that most Building Control follow is to accept an EICR for the property. Of course that will mean paying out for the EICR and the fee to Building Control for submission. All Building Control Authorities are different though so speak to your one regarding the situation and the way forward. Slight complication is an EICR will cover more than the scope of the rewire, it will cover the complete Electrical Installation. Any faults will need to be rectified and if these are outside of the works agreed (rewire scope) you won't be able to claim for them. Though of course having an EICR will be a good thing for peace of mind. Start putting everything in writing so if you need to go small claims later you have the audit trail. Follow up with NAPIT, you won't get an Electrician worth his/her salt to sign off work they haven't done. There is a scheme Napit do for 3rd party sign off but they would have visited during the work to inspect, you cannot inspect the hidden stuff once it is completed. Hope that helps

I am by no means an electrician but if my memory serves me right I'm sure iv been told it doesn't matter who does the work even if it's yourself as long as you get it signed by someone qualified. I know this is still a cost but I hope I'm right and your concern over whether it will need redoing can be eased. Also, I would put a little pressure on him via messages or email and of you have his address by mail and say that you will go to trading standards. Your bank can also help nowadays if you report an issue with the transaction stating you didn't recieve the full service quoted for and paid for.