Hindware — Kitchen Sink not replaced yet

Hi Sir/Madam,

I gave my written complaint to Hindware reg my broken kitchen sink 2 mnths back. I've been calling them every week but it's not yet replaced. I'm having a tough time as the current one cannot be used at all. F.Y.I I bought Hindware kitchen sink 2 yrs back. It has 7 yr warranty but the sink got broken and cannot be used at all.
I don't know what action to take further. Please suggest if you have any suggestion reg. the same.

Thanks,
Atul Jain