Awaiting invoice and no responce to calls or mails

Parcel from Aukland sent on 21/08. Delivery date 31/08. Paid for air as gifts for my sons 1st bday also in there. Cutoms held it for a week as there was invoice issues which was sorted by Candice Williams. It arrived in Maitland on 07/09, and i am still waiting for an invoice to pay for my goods. This after numerous complaints, calling daily and emailing daily, by my and by Carla Petersen, who sent it. We have dealt with Vincent Nawase(who was helpful but had no support), Aaron Zulu, Yoliswa Mazibuko(send me the same documents twice but no invoice, so does she know what an invoice is?), Thembikile Langa, Erna Holmes and Louis De La Tour. The whole COD accounts department who takes my contact info and guess what, no contact. So today is 14/09. My sons birthday was 10/09, and still no invoice. The post office gives better service. You guys are pathetic. I cant believe we paid so much and this is the result. No iisues from New Zealand. Once in RSA this **** started. Tracking number: *** . Im sure response will be we apologise, contact our call centre.