Snapdeal.com — sent me a used gopro hero 6

Address:

Thrissur, Kerala, 680101

I have purchased a brand new gopro hero 6 on snapdeal on 18th july and i got the product on 23rd july. From the inspection the box sticker was tampered and the product inside was a used product with a bulged damaged battery. So we requested return and refund on the same day but there is no response from the snapdeal till date, i have also sent a complaint mail but no response from them. They dont even have a customer service as our calls are not reaching to any human being all the queries are attended by the automated answering system.