Amazon India — return request is keep on cancelling

Order #[protected]
The problem i am facing is that from the past 13 days i am giving return request for exchange of the product. Company is taking my request and after 2-3 days i receive a msg from bluedart that the pickup has been cancelled from amazon. Now when i call them they say we will again arrange to pickup the parcel but again same thing happen. Now these customer care girls are not talking properly and not telling the matter clearly or not transfering the call to higer authority..
Dont know what to do.