Amazon India - Refund not provided

About a month ago I purchased a guitar amp through online payment Order no***-*******-******* of ***** rupees after six seven days I received it and while unboxing I heard some noise and it turned out that the amp was damaged the speaker inside was moving I placed for a replacement and after ** to ** days I got one but sadly that too was defective so I asked for refund the whole month was gone in the process of returning and picking up and on top of that the amp weighs around ** KGS so I went through that process twice carrying that heavy stuff days went by and I am still waiting for my refund the customer care told me that they will refund me in * business days but its been like fourteen days evertime they lie to me and tell me that I will receive it by tomorrow but I am still waiting for that tomorrow now they are telling me that the amp has not reached the seller yet after the seller gets it than in next three days I will get my refund..The seller received his product three days ago and they still haven't refunded me back Now they are saying they will refund me in * working days bank policy First they said * bussiness days than they lied to me saying as soon as the sellers gets his product back than after * days they will refund me and now the seller got back his product they have extended another * days and after that they will again extend another * days this will go on i have wasted whole October in returning and picking and they wants me to waste whole November for refunding They are just building up lies please if u can help me to get my hard earned money back..