Myntra - Package not delivered

I have ordered an HRX sports shoe from Myntra which is in an offer on **st June at the time of End of Reason sale. The MRP of that product is **** after discounts I just paid ****. At that time they gave delivery date as *st July, still, then I got no updates from them. I contact them and asked about the update. They asked me ** hrs of time to give an update to me. Even after ** hrs, I got no solution I tweeted the situation to Myntra then they asked me ** hrs to resolve. Again I got no update so again I text to Myntra in twitter then again they asked ** hrs to reach me. The next day one of the solutions escalation team head called me and asked ** hrs again to resolve but again I got no update so I called to Myntra customer care. They asked me for ** hrs again to get an update. After *-* hrs of that, I got a call and he asked ** hrs of time. Today that ** hrs of time was completed but got no updates from them. Again I called to Myntra and their behaviour is not at all good. She was very aggressively asked ** hrs again after listening to my concern and simply disconnect my call and now I got a call from case manager "RAKSHIT" from Myntra and she is telling she is one of the higher authority and facing the problem with logistic dept. They asked * days to sort it out but she is not sure to resolve, when I ask if it not happens in * days then what will be the next step means she started shouting on me that "This is the solution I have at present if you want to cancel the product then go on". But by comparing the cost of my purchase from **st June to today's date it's showing *** Rs difference.
In the meanwhile of these complaints going on, I personally checked the delivery agency which the details they mentioned in my order details are "Expressbees". I called them and asked about the tracking no. They confirmed that they didn't receive the product from Myntra. So I shared this info to Myntra, till I shared this info they didn't know that product is not delivered to the agency.
This way they gave me fake promises to resolve the issue. In the meanwhile, they provide me with a coupon as a token of apology of up to *** on purchase of ****, while I tried to apply that on the same product it's giving ** Rs of discount which is less than tax amount on the product. I asked them to suggest at least one product to utilize the coupon properly but the gave no proper solution. In this way, they are bothering me from *st July. Totally they delayed ** days and still asking * more days that to not surely to resolve.