Nilkamal — there is no sign of delivery

I had ordered a ergonomic chair on 31th may that was supposed to be delivered on 16th june. But there is no sign of delivery. Neither is there any response on the call centre number nor is there any proper update on email.
Its an indefinite dead lock i am being forced into. They are cheating customers. Order # 5944. Even they do no reply on social networking websites they are part of. Where do i reach i do not know.