Make my trip - Refund not received

I had booked flight tickets for the round trip of * people from Mumbai to Zurich for the *th of January **** upto **th of January ****. On the same day I booked my tickets, I wanted to changed the dates of my flight as the plan changed. I wanted to prepone the tickets to the same dates of the previous month i.e. December ****. I called MakeMyTrip for the date change process, the executive named Bhavna Joshi initially told me that the tickets are non-refundable and the date change amount for both the passengers is Rs.*****, so I payed the amount. I got a call back by the same person telling me that the date change amount was something around Rs.**,*** per person, so I would have to pay the remaining amount. I was totally shocked that I had to pay so much extra amount even after I already paid the said amount for the date change. Again I asked for a refund if it's possible
and they said they'll call me back. Within a minute, I recieved a callback from the same person, she told me that as I am cancelling the tickets on the same day as I would recieve a complete refund, of both the amounts, the tickets as well as the amount paid for the date change. I cancelled the tickets because I was promised a full refund. I was relieved and asked her that when would I recieve the refund, she said I'd get the complete refund within ** days. But as I had to book the tickets soon as it was an important trip, I booked new tickets of the same price with the only money left in my savings, which cost me more than * lacs. I did this because I believed that the refund amount was going to be credited in ** days. But as days went by, I didn't recieve any refund. It had been more than a month. And I was out of all my savings. I was so stressed out. I tried contacting MMT, everytime a different executive picked up and I had to explain the case to different people each time. Two times, the executives told me that it is the policy of MMT that if I cancel the tickets on the sam day as I had booked them, I am bound to recieve a complete refund. They said I will receive it in a few more days. Later, I got a call from another executive telling me that my tickets are non-refundable and if I still want to process with the minimal amount of less than ** thousand for the refund. I politely replied that I was promised a full refund from your side, and I want that. Then he asked me if I had any proof of that, I said yes i have the call recording (which I actually have), then he hung up on me. It was as though they were checking up on me if I had any proof. It had been more than * months, I was suffering with a lot of financial difficulties. I had not even imagined that something like this would happen. Recently I got an email from MMT saying that my refund has been processed and I only recieved Rs. ****.
Make my trip had promised me a full refund of Rs.****** and gave me only Rs.**** which is negligible compared to the original amount.
This incident has caused me a lot of mental stress, anxiety and financial problems. I have had to deal with situations I had not imagined would occur in my life, I had to borrow money from my friends for my daily expenses. I wouldn't have had been through all this if MMT would have just done what they had promised. Now I am forced to file a consumer complaint, as I am out of both my patience and money.
I hope voxya can help me with this.