Swiggy — Order undelivered but it was marked as delivered. And they won't validate my claim.

I had placed an order through Swiggy at 1.30 in the night from pizza hut. I waited but I wasn't able to see any movement on the order though it said it had been picked up. I eventually assumed that it had been canceled or was unable to be delivered because it had happened to me before, again during midnight.
Since I never received any call from Swiggy or from the delivery partner I thought there was some issue because otherwise I would receive a call from either, from my experience as I order a lot from Swiggy. So the next morning when I checked my Swiggy it said that the order was delivered when in fact it wasn't. So I started chat support and I tried the option of continue on call but it said I didn't have an active order so I can't continue on call. So I continued on chat. A representative told me that since it was more than 5-6 hours ago I will have to email the support team to the email address [protected]@swiggy.in
I emailed them when I got the chance at 4.37pm explaining what had happened and attached the screenshots of the order details and the chat with the support from the app. I got a response from them at 9.23pm that after thorough investigation they were unable to validate my claim and therefore will not be issuing me any compensation.
First of all, as someone who has been using Swiggy for so long, why would need to fabricate a lie for compensation?
Second of all, how can I prove that I haven't received the order?
I have asked them to check their records to see if I was ever contacted by the delivery executive or Swiggy support for delivery because I received no calls whatsoever.
Also attaching the email screen shots.