Myntra.com — Delivery is late

I ordered a blue maxi dress from myntra on october first week and they mentioned that they delivered on october 15 . And now the date was november 2 still they didn't delivered it to me. Now the myntra says the november 7 th day they should delivered ... I didn't expect this from myntra... I can't accept it if the product didn't reach within november 7 ... I'll return it if more days have taken