Samsung Lcd T. V. — replacement of t.v.

i purchased a samsung lcd t.v.from chennai ,after eight months one line appear on the screen . i complainted after one month serivce person come,but he not able to something. He said i will replace new t.v.& said u have wait for 25 days .but till date i have not received any msg almost 45 days over. Take action to replace t.v. otherwise i will go to consumer counil notice & compliant.
thank u