Mcdonald's India — rejected order and failure to refund

I placed an order from MacDonald's through MacDonald's app and the payment was done through paytm. The order was cancelled by the restaurant because of roadwork, but no refund was initiated. When I contacted MacDonald's they said I'd have to contact paytm to initiate the refund, despite there being no fault on my side in this matter. After requesting help from paytm they asked me to provide proof for the cancellation of the order.

They didnt even take a look at the screenshot I attached in the first place (the one sent over by MacDonald's executive as the proof of cancellation). Even after sending the mssg for a second time, they responded saying that they would get in touch with MacDonald's executives and then initiate the refund ..

However when I logged back into paytm, then chat history was completely erased leaving me with no proof of conversation with the paytm executives and no updates regarding the status of my refund.

Neither MacDonald's executives are responding now, nor the paytm ones...