Hi
Sorry for you,,, i feel that only thing can be done is to get a 3 phase connection from ECG, the issue is that on your particular line ECG may have proble of low voltage and its very common now a days... i also had similar issues at my previous house and the owner was able to work out with ECG to get new line to the house...
thretening the land loard may not work here, eventhough he has cheated you...
so take thing very quitely and talk nice to landload and explain ur problems and request him to help... i am hopefull and praying for u..
cheers
ash