Amazon.in — amazon return package pickup service

My name is kalpana i order a tshirt on amazon but it is too big in size... I requested to return it.. I called many times on amazon but my return package has not been picked up till now... Pick up executive refused to come to my location.
He want me to come to his location.. He did not attempt to pick up my return at all.. I called many times on amazon but my problem is not resolved yet. Even after 18 days my return is not picked up..