MTN upgrade service from Rewardsco is pathetic

1 star is generous. I have spent a week calling, emailing and eventually going in personally to a mtn outlet to attempt to sort out an upgrade I submitted online. The upgrade was done 2 weeks ago and approved but the order and delivery of a handset has been delayed due to no stock. Unfortunately it seems that MTN cannot sort the problem out or change the handset colour ordered so as to proceed with the delivery because this has been subcontracted to Rewardsco who "own" the rights to upgrade MTN clients. If this is how MTN allows its clients of 25years to be managed then should seriously review their SLA with Rewardsco!