HP India — I have given my chromebook for service it's been 90 days still my chromebook is not returned.(case ID.[protected])

My chromebook is repaired during warranty period so I have contacted hp support and service person come and collect my hp chromebook on June 21by saying it will be return to me in a week. After one week I have contacted service person he told me that my Chromebook is hand over to other person they will return it back to me .After few days I have received mail saying my Chromebook is delivered so I again contact hp support and filed complaint with the case ID number [protected]. But my chromebook is not return. Kindly look into this issue