Missing parcels not insured!!

They don't advise on which postal company they will be using and they don't take out any insurances on parcels, so my parcel went missing in South Africa because they used the cheapest and worst postal services, SA Post Office and after investigation, I found out they don't take out insurances on parcels, they did not even bother to compensate on anything. So I lost my parcel and a refund................ NOT ON!