SA Airlink Unwilling to take Responsibilty or try to assist when error is on their side!!

I was so disgusted by SA Airlinks inwillingness to take any reposibility. We had made a booking for a flight and money went of from my account. When we arrived at airport they said there was error in booking and that I need to call my bank and reverse payment. When I called my bank to reverse payment to be able to rebook a flight (now later) they said SA Airlink should issue a letter expalining their error for them to be able to reverse payment. When I asked the lady from Airlink for the letter she said it can only be done on Monday. This then meant I had to spen another R1700 to be able to book the flight and they can only assist me in Monday. Absolutely resiculous what if I did not have more miney to buy a ticket- the manner in which they just do not care about clients and service is appauling.