Realme — realme band/not working properly

Realme launched realme band on 5th march and they sold the product on the same day with hate to wait sale. I bought the product and it is completely a bad product. The primary functionalities of the band steps tracker is not accurate, phone and message notifications are not coming even though given all access permissions. As the band primary functionalities are not working, i raised complaint to realme. But they responding with they don't have refund policies. I thought it was problem with only my band, but when i see comments of a thread related to realme band in realme community everyone is complaining about the same issues.