LG Electronics — 32" LG smart 3D TV

I have purchased 32LA 6210-TD Sr no 303NDHBE4681 from Lulu (Oman)on 4th July 2013 .This TV has been installed in India 14th July 13 .I was facing problem with the TV as the display was not seen .When contacted LG service center from India, they had replaced mother board as it was failed on 27 th July 2014 .Now after 7 months i am faced the same problem (motherboard has failed) .The LG service engineer attended and told the spare needs to be changed Cost Rs 5000 / .I requested since the failure is 2nd time within 7 months the part should be replaced free of cost, but LG says that it is out of warranty and I will have to pay for the same . I have refused to pay since I doubt for the quality as the same part fails within the period ot 7 months and the basic reason of failure is not known . I have already reported earlier but there is no response really frustrated for their service and quality . Umesh