URGENT!!!!! - UNACCEPTABLE SERVICE OR LACK THEREOF

Shocking service once again from MTN. I finally received my device last Wednesday only for the device to be faulty. I spent most of the day calling MTN, speaking to multiple people who was not willing to assist me. I emailed several people but still no luck. I escalated to customer service, rapid response, complaints and management but no response from anyone. Seeing there is a stock issue, I managed to get a store to keep the 1 for me so I can arrange to do a swap. Not the agent tells me I must return it at the store but will have to wait another 10 days to change the device. How disgusting and pathetic is this? Is this how a long standing client gets treated?

Will someone at MTN call me to sort this out as the store will not keep the device for me for too long. I also cannot be left without a device for 10 days!!!!!!!!