Upgrade order not received

I absolutely love vodacom service and the service i recently received from olivia from the hellopeter division regarding my last complaint however i recently did an upgrade order its been about 2 weeks that i have not received my device as yet i keep calling the call centre and they keep giving me the run around and excuses saying theres no stock when one agent said stock is actually available so im not sure whats happening and would really appreciate if someone can assist me regarding this please