Myntra.com — order not fulfilled even after 15 days., not getting any proper reply

I ordered one cloth item on 24-Dec-2019., Order #[protected]-2946201.

It was supposed to be delivered on 02-Jan-20 but as on 08-Jan it is not delivered. Called several times on Customer Care helpline but not getting any reply which can help. Order status still showing that it will be delivered on 02-Jan. Don't know how to escalate it further.