Abysmal online service

I have had a terrible experience ordering a pair of shoes from Crocs SA. Three weeks ago there was a sale on the Crocs website and subsequently a problem with Payfast, their merchant service, and my bank so the payment did not reflect. At first I received very good service from them as an online consultant phoned me and helped create a Payfast 'wallet' so that I could track the payment, therefore the payment was made but with no order number. She then assured me she would be in touch regarding my order. After countless emails, messages via the Facebook page and phone calls to the helpline (which last for HALF AN HOUR or more) with an infuriating automated message promising you that your call is FIRST in line, I have not spoken to a single person yet or resolved the problem. I have no order number, no proof of payment (except an email thread) and no goods received.