Amazon India — defective dell laptop

Address:

Ahmedabad, Gujarat, 400701

I received a defective laptop.
And after talking with their customer service i followed the procedure for replacement. They told that the sell has changed and they will refund my money. And they arranged a pickup on 7th september... They didn't visit my home and told that my room was locked.. Almost 1 week spend but still they didn't arrange a pickup and they still saying don't worry we understand your situation we are really sorry we will try our best to solve your problem as soon as possible...
After that i'm following their useless customer service everyday for pickup but nobody is coming.. They always say lie and give false information. Amazon is cheating with customers... Amazon is selling faulty product to customers..