it sounds like your main panel is only rated for 100 amp maximum. so:
1. pay a different licensed master electrician with whom you would do
business to perform a written inspection of your system from the pole
thru the panel and all the way to your outlets, including service wire
sizes, panel specifications, main and other breaker sizes, and outlets
and other electrical items included in your contract and its
blueprints; and estimate the cost to change the service to the 200 amp
220 volt service you ordered in writing including photographs. do not
clutter this up with any addons unless you discover other things
missing.
2. have a cup of coffee and decide how much money the difference is
that you have been damaged.
3. pay your attorney to send a legal notice letter appropriate to your
state or country to the seller of your new home requesting the
compensation, and follow your attorney's advice.