Koryo — washing machine - delay in resolution of defect

On complaint and post verification on 21jun 19 a replacement of defected part was ordered in the company, while the product is under warranty. (Bought 6 months ago). It was informed this will take 5 days. I am continuously following up in customer care (3 weeks now) but they are not providing a replacement part or replacement.
Everytime when i try reaching them they ask for more time/they will revert within "x" time but they never come back.
This is escalated 4 times and their escalation manger "chintan" has also failed in providing a resolution/replacement.