Glen — gas stove automatic on is not working

I have purchased gas stove and chimney of glen on october 2016.. It's not yet 1year and stove isn't working properly... That is the automatic on system is not working.. I have complained so many times regarding this to the retail store many times but no use.. This is affecting our daily needs... Please fix this and do the needful asap... I need this to be fixed on very urgent basis