Zomato - Not refund my full money and make excuses

I order two samosas on ** August of ** rupees (** Rs Paytm + ** Rs Zomato credit). The restaurant accepts the order but after a few minutes, I get a call from Zomato delivery boy he said samosa not available. I chat with Zomato executive he said ok I cancel your order you get your full refund in ** to ** hours. I said ok after * day I tell them I received ** Rs in Paytm but not get ** rupees in Zomato credit. They said to wait for ** to ** hours amount will reflect in your Zomato credit. After ** hours I did not get money then they said ok sorry for this please wait for next ** hours amount surely show in your account then I said ok. After ** hours I again message today then they said money already refunded to you ** Rs in Zomato credit and its expired. I shocked how and when. I really don't know they do this when they add and when it's expired. I did not get food first then they cancelled my order then I did not get money. Matlab khaya piya kuch nahi or bill bhi bharwa liya. Please help me. Kisi bhi tarah help karo me inhe sabak sikha ke rahunga.
Zomato order number - **********