Delaying my parcel delivery date

My parcel was delivered to them on the 11th. Everyday I am calling to find out when they will send my parcel. You will wail over 2 hours to be assisted and then they informed you that it will only be delivered on the 17th, According to the Natis it should have been delivered yesterday, they charged R100 delivery fee, for the worst service ever. Please Natis stop using this courier service please go back to Ram