Myntra.com — h&m sweatshirt

I ordered a sweatshirt of h&m from myntra of size xs/s and myntra delivered me the wrong size which is xxl/s. And i have told them about the issue but they are just telling me that they will solve this issue by this date and when the date comes they don’t even reply. Even after that i had to make call and ask what happened to the issue which you promised to solve by today then they say give us 24 hours more and i say ok because i dont have any more options. So i wait and call the next day and the same thing happens. They asked me to share the pictures and tags. I sent everything they asked for but they are not doing anything about it. They asked me to for 48 more hours excluding those i mentioned above and now it has been over. So i am here to get help and get my money back from the looters stealers. Please help me get justice. Please punish them. They caused me a lot of trouble and also have my money.