Meesho — Incomplete refund

Website:

www.meesho.com

I had purchased two cotton suits from Meesho and due to quality issues had to return them. The suits were Black and Green in colour. The courier guy picked up both of them but Meesho issued refund.for only one of them saying that they had not received two suits. I have kept on complaining to them but they do not listen and the courier person also confirmed that he had picked up two suits.
This type of behavior from Meesho is very irresponsible.
Please help me out.