Rak Ceramics India — repair of wash basin crack under warranty

Address:

411028

Hello i have a wash basin crack that needs to be repaired urgently as it it is under current warranty.
I had repeatedly called the customer care number only to be told that i will get a call back which i never did.
They are deliberately delaying this so my warranty will expire. I have been calling customer care daily for the last 7 days.
Everybody in this apartment is getting the same problem on the wash basins so the entire stock seems faulty.
And this is probably why they are stonewalling the complaints.