Amazon India — Refund are not credited

I give less than one star because i am order the one product, both amazon delivery worng product. So i am applying refund options. Courier partner pickup the product and than i am calling amazon care services, care are say than amount are refund 10 to 15 working day but more than 20 day after my amount are not refund. Then i am call care services, but care customer seys that i can't help regarding your refund request. That way i am giving one star because amazon services are bad. Thief company