Screen Guards India — Iphone 7 back cover

I had purchase a i phone 7 back cover on 2nd dec 2017 for 999rs.

As per company site/policy product can be return with in 10 days of purchase but on call with customer representative, he said "we can't return the product if you change your mind because we delivered what ever you ordered".

I feel cheated in this case as it is totally against the law/policy.