So called courier!!!

Not the first time!!! a parcel was sent to me from China on 6/11. Since then it has been impossible to trace. Website shows different locations every time i track, then its in SA then its in Beijing now today its back at my supplier. No one at TNT is willing to help me or answer my emails. Every time i bring in a parcel i have to track it and contact TNT to send me the documents for payment then nag for delivery just to be told no payment has been made. It is impossible to get hold of anyone because of automated systems and being transferred from pillar to post. The lady i do have an email address for (Tertia Botha) just does not answer my emails, i get read messages from here but she is not bothered to answer me, not even with a ***** you.