Total incompetence

I had to pay a customs fine for over R2,000 due errors made by the Aramex staff when filling in forms for customs clearance resulting from the incompetence of the Aramex staff, (entered wrong amount and used wrong customs code). On the phone the company is totally not willing to help and simply state that it is "not their problem" and I must ask for refund from the supplier and if I do not pay, the goods will be forfeited.