Swiggy - Incorrect items delivered and unfair resolution

I placed a food order on Swiggy on *th January **** at *:** PM from Shree Balaji Bhojnalaya, Sikar Road Jaipur. The total order amounted to Rs. ***, after applying offers, delivery, taxes, etc. The order contained * items which are:-
*. * Combo - Dal Fry + Tandoori Butter Roti (*) + Salad
*. * Malai Kofta
Order was delivered at around *:** PM. When I opened the package, I noticed that “instead of * Butter Tandoori Roti, * Plain Tawa Chapati” was delivered. I immediately tried to contact Swiggy via the chat support but chat was being closed repeatedly by the chatbot citing the complaint has been registered and will be responded within *-* hours. Since, I wanted to chat with an executive I used the option of payment related issue, as soon as I got connected with an executive, I explained the issue to the executive and asked to be transferred to someone who looks after order related issue but no heed was given. The executives took too long to respond and abruptly closed the chat twice asking me to send and email to email-support@swiggy.in which would be responded to within ** hours.
No heed was given to my request to be transferred to an executive who handles order related issues, I requested multiple times for the same and replace the order with the correct items which I had ordered. But no support regarding the same was provided.
Next morning, I received a mail that Swiggy has sent a Rs. ** Coupon for which I had never consented to or gave confirmation to. When I inquired about the same, demanded refund of full amount to the source account and asked to provide me the breakup of the amount. They were unable to provide me with anything, instead sent me another coupon of Rs. ** unnecessarily. These coupons are worthless, they cannot be clubbed with any other offers, has a validity to be used within ** days.
For past one week I have been asking them to refund my full amount back to the source account, provide the details of their customer relations manager, provide the breakup of the amount the are generating coupons to, status of action being taken against the Restaurant, any sort of proof where I had confirmed compensation in form of coupons. They are unable to provide me with any details.