Croma Tata Enterprise — deffected product and wrong information

respected person,
i purchased a LG lcd from croma bandra on 8th delivery date was 9th which they delivered on 10th and the guy who was coming for installation came on 11th while installing it came to my notice that the panel sides has some black color on the glass which i complained the same min and was expecting a call back within 2 hours but no1 reverted back to me after complaining on the hotline 4 times which they have it in record i even insisted if i could get bring it back myself and take a new peace they refused to that and though this is a small issue the bigger issue is :-

wrong information given to me by the sales man saying samsung 6series is not available with them which i wanted in 32 inches i called up hotlline of croma they said they have it also in other branch in juhu has it on display also so i needed my lcd very quick so i opted for LG though i wasnt very satisfied with just because it was ready it stock i need 6 series as if they have make the replacement for the current lcd they have sent but no1 is calling me back regarding the same what am i suppose to do please help.

regards

bharat B