Mondo Bad Service

So i upgraded with MTN and sadly they use Mondo for the sale and delivery if you do it online. I upgraded on the 25th of November, no one responded or let me know there isn't stock but I still qualify for black Friday special I app**** for, after a week I had to call them as I was not even sure of the status of my upgrade. I contacted them numerous times with no luck, i asked them then to let me know IF I can cancel to go instore, they said they would contact me, they did, but on a sms saying it WAS cancelled I can go instore. This after enquirying if possible, not cancelling. I called, they did not know what to say and would call me back. Then I called MTN N1 city (STUNNING SERVICE) and the lady Angie assisted me immediately saying the order is not cancelled even though my sms said so. I struggled for days to get answers from Mondo, until yesterday I told them I am coming here to Hello Peter and social media for their BAD Service and for them to action a propper cancellation so I could go instore.. WHY I ask you must a person become this way to get service. The guy said to gice him an hour and all of a sudden after 20 minutes it was resolved