MTN - bad service

I have app**** for a contact for 5 devices at the end of September, which application has been approved. Up to now I have not received any of the devices because MTN doesn't have stock! How can they advertise a device if they don't have stoc**** When phoning MTN head office I have been pushed from pillar to post. No one can assist. I have been a Vodacom customer for ages and wanted to move over to MTN but think I will have to reconsider. If service from MTN start like this... then I can just imagine how it is always going to be.