Myntra.com — i did not receive my order but they updated that the product is delivered

I have not received my product - myntra order #[protected]-6204403. I ordered on jun 1, 2020 and on 9th they said it's delivered. I did not receive any message on the delivery and when i found out, i opened a ticket on jun 14th asking for delivery details. Till today they are just closing ticket without any resolution. I would like to escalate this matter and get a proper resolution. If myntra is confident that they delivered, can they provide evidence of delivery? This incident makes me think only cod is better since they have to collect money at time of delivery.