Poor Service

Invoice was received from UPS for payment to be made. I phoned to inform them that we do not pay duty and supp**** them with the correct tariff code for the import. I asked them to please correct and re-send the invoice for payment. (This was on Tuesday). I phoned to follow up on Wednesday (23/03/2016) and was informed that they are having system problems and could not supply me with a new invoice. I phoned again this morning to follow up and Nthabi said that they are with this and that she would get back to me. I emailed her regarding the new invoice as this is a urgent order for a client. She said that her colleague is busy with the new invoice and that she will get back to me in 10-15 min. I am still waiting!!!