Myntra.com — wrong/different product received

Address: 201301

I have ordered jack & jones men black & white slim fit checked casual shirt size: 38 | qty: 1 order no:[protected]-5905401on 24th june 2019 from myntra.com. But i have received wrong product that means i got black t-shirt instead of shirt (Jack & jones men shirt).
From last week i am trying to connect with myntra customer care but again and again customer care associate is saying "we have technical problems and please contact to us after 4 hours". I wondered instead of any help they are saying only one sentence "please try to contact after 4 hours".

I raised return request, but delivery person is saying "take approval for this item from customer care". But again and again i am unable to take approval for return this wrong product.

This is very blunder of deliver the wrong product.
I think, myntra is cheating and looting to customer.