MTN THEFT

I upgraded a contract in July 2021. MTN have been debiting me for a device and they have failed to deliver the device. Its been 9 months now and MTN have not delivered the device. I have explored every avenue to try get my account credited and retrieve the device. Nothing works. No one at MTN cares about this dispute. No one at MTN has been of assistance. MTN are debiting my account for a device they have not given me.