complain not attend since 3 month

on apirl 18 i have registerd complain about room cooler . i have recived message that within 4 days our techincic will visit .but 3 months i have not vecived any information from our techinication .i have called customer care 10 times .cooler warrenty is 12 months.if your technic take 3 month to repair then how give extended complant no ref.3072 .
my no is 8095950333