Adidas — Iam complaining about the returned product

Address:

D2-3 Swami Samarth Nagar Laxmi Nagar, Laxmi Nagar , Link Road chinchwad

I've returned my product and it's been a month and the service says the refund is been given within 14 days, but it's been over a month. It shows my product is reached the warehouse, they said it's cash on delivery so they will send a form and i have to fill bank details about it, but there's nothing sent by them yet . My 3000 rupees is been trapped. That's highly disappointing by this type of international brand .