Poor service

I was due for an upgrade on 1 of my many contracts with Vodacom as I've been a customers for many many years and pre-order the Samsung ultra with the voucher for some reason got cancelled called again said ill get device and voucher however only the device arrived sent it back now have to wait for device to be checked in before I can finally resubmit upgrade again honestly Vodacom for a longstanding customers and I know you have millions 1 not gonna make a difference but this is not great for me so if I can't get this upgrade with the voucher sorted today.... I'm done with you as when my contracts fall due they will be cancelled...