medirent services pvt ltd - Rent charged for medical equipment not used

I had hired an oxygen cylinder and recliner from Medirent services Pvt limited, Vikaspuri on ** Dec **. Since this company was recommended by Doctor of Saroj Hospital for Home care.@ Rs. **** per month and security of Rs. **k. But unfortunately my mother passed away in the Hospital and this medical equipment were never used and it was returned immediately. Though they returned the security cheque of Rs **k. They refused to return **** and they must have rented to on some other patient and made an equal amount of rent. My repeated request for a refund fell on deaf years and shows there heartlessness and insensitivity towards already traumatised family members. Why pay rent for something never used or they could have returned some percentage to the bereaved family members.