Word delivery service

Got such bad service from Postnet. Arranged for a parcel to be sent express overnight and paid for this service. 24 Hours later after not being able to track the waybill number all day the following day, I decided to give Postnet a call. After 3 different advisors hung up on me after every request, I had to ask someone to physically go into the store to track the delivery in Upington where it was sent from. Eventually found out that the parcel is still stuck in the warehouse somewhere and delivery will now only take place 4 days later. The reason given for this was that there was apparently a mixup with the parcels. If I knew Postnet was not able to deliver my parcel as it was paid for on time, I would have used a different service provider who could deliver on the promise. There was a reason I need this parcel to be delivered the next day and Postnet does not seem to care. I guess now I have to just wait and see if I will ever receive the parcel or ifs it's just missing at this point