Amazon India — Product and Customer Service

Amazon India Customer service is very unprofessional. They just don't care about us. I ordered a Amazon Prime item. It was marked as urgent one day delivery. They faild to deliver the item on time, then again same item was delayed for a week. When I contacted Customer service, first they gave me false promises. When they again fail to fullfill thier promise I called them. I humbly ask if there is any way to escalate or Submit compliant. They said there is no way to file compliant. When I called and demand supervisor they put me on hold and disconnect the call more than once. Plz help me .