Amazon India — refund for cancelled order not received

Website:

Amazon India

I placed online order no.[protected] with amazon india on 02nd may 2017 for wahl 9484-400 u-clip pro home pet grooming kit by wahl professional animal and paid rs.2, 918.68 by credit card, as per amazon requirement. However, as the product was not suitable for me, i cancelled the order on 05th may, 2017.
Amazon india confirmed cancellation of the order by email of same date and advised that the refund of rs. 2, 918.68 will be done as soon as the product is received by them.
After about 3 weeks the company sent me the product, delivery of which was not accepted by me, stating that the return process has already started.
Although now 3 months have passed, i have not received the refund of the amount of rs.2, 918.68 paid by me through credit card.
The company is not responding.