BSA Hercules — Hercules Flare City

I bought Hercules Flare City cycle on 19th June'21 from Saraswathi cycle emporium, G N Chetty Road, T Nagar, Chennai for Rs. 7000.

My son has been using this and the usage is very low. He takes out only twice or thrice a week and rides within 1KM vicinity.

I am facing following issues with the cycle.

Seat is getting rotated, back wheel making weird noise and some of the spokes in the back wheel are very lose.

Very disappointed with the product. Pls do the needful.