PharmEasy — Wrong medicine delivered and harassing during refund

I have ordered Nestle resource high protein (5 Nos.) for my wife who is patient but Pharmeasy delivered wrong one instead of I have ordered and product which they have shown on their portal which can be harmful for my wife. I have raise return request and after that I have not received the complete amount (they refund for 4nos. instead of 5Nos). I also requested the refund in to my bank account but they refund for one in my bank account and for 3nos in to pharmeasy wallet.