Naaptol — Incomplete product delivered

Address:

Chennai, Tamil Nadu

I bought a 102 pcs multipurpose tool kit from Naaptol.com, in May. When the product arrived, it had only 52 pcs instead of the 102 mentioned in the newspaper advert, also I did not receive the free 32 pieces screwdriver set. When I contacted the company about the same. I was asked to send the product back via a courier service and they would refund me the money, only after 21 days. I complained to them that it was unfair to expect the payment at the point os sale , but would process the delivery only after 21 days. Please help me take this further.