This is a very difficult question, more suited to a legal forum. For one thing, you have not discussed exactly what contract you had with the electrician. He is only obligated to do the work set forth in your signed contract, so if your contract calls for him to pull the permit, install the meter, and have it pass inspection, he likely did exactly what he was required to do.
The fact that the POCO had additional requirements beyond the permit is unfortunate, and if your contract required the contractor to coordinate with the POCO, then of course he would have been obligated to do so. But if your contract fails to mention coordination with the POCO, then it is a tricky question as to whether the electrician was obligated to contact the POCO and meet their standards.
It is certainly reasonable for you to ask the electrician to finish the job per POCO requirements at no additional cost, but if he refuses, this becomes a tough question in my book.