Amazon — redmi note 8 (space black)

My name is bal krishan pandey. My order number is[protected]) which was order on 3 december 2019 and order delevered on 4 december 2019.
But when the box opened there was no charger in box.
I the complained to amazon customer care.
They arrange the return pickup.
But the return pickup cancel automatically on the date of return pickup. After that i have complained 6-7 to amazon customer care but always amazon customer care said next time 100% successfully pickup will be done.
I also complained to senior management team of amazon by mail they also said that your problem solve and return pickup successfully will be done next time.
But always return pickup is cancelled automatically.
And the amazon pickup agent not come to home address and they not call to me.
And the amazon pickup agent number always dial the number does not ringing.
I didn't expect it from amazon.
Please i request to solve my problem.