Poor Service from SA Post Office

I posted a parcel on 23/11/2019, and to date the parcel has not been delivered to the place I sent it to. It was a domestic parcel, sent from JHB to KZN. I have been sending emails to the customer services, but have no feedback to the status or whereabouts of this parcel. When I call the customer services, I get a recorded message that all the consultants are busy, and end up putting the phone down after waiting for more than 20 minutes. I cannot check on the website, because it does not give me a place where I can put the tracking number. It is now more than 2 months and I have no feedback from the Post Office. The parcel is insured, and when I ask for a claim form to claim on it, they tell me the parcel is in transit. How long does it take for a parcel to go from JHB to KZN. The service from the post office is deplorable. They do not answer the phones, nor do they respond to emails. Where do I go from here???