Dell inspiron 15R N5010
Dell not able to provide service

I purchased a laptop from a retailer in somdata plazza. Now after six months Its hard disk has got damaged.

When I called dell customer care he told me the retailer has not sent the invoice copy of your machine so we can't help you. When i talked to the retailer he told me that the dell's people are lying and they don't want to provide service so i gave my retailer my laptop to change its hard disk. this was two weeks ago from tody (27/01). He says he has already locked the complaint in the dell service centre and its thier responsibility to send a mechanic. I don't understand to whom should i ask for help. what is the reason who is lying i don't understand... please help, waiting for your reply.