Bad bad bad experience

I went there and filled my car with R300 rand petrol and wanted to pay with wocode, as I had previously done so, after a few attempts, the cashiers tells me that it's refusing and I asked the supervisor to give us a way forward, but she comes In and she does not even know what a wocode is. Another supervisor come, Meshack and tries, and he tells me it's refusing. I asked what the error message is so that I can escalate it and they can't really tell. Meshack continues to tell me that I have to find another way to pay but I don't have any other way to pay, especially if they can't tell me what the issue is and he just leaves me there hanging. I myself, call another garage for them to tell us what they usually do when the system "refuses" and they help, but the two ladies seem disinterested to help further. I had to make other means to pay the bill, despite having a wicode that is working perfectly fine, as my colleque, used it in engen garage and I used it 2 hours prior to my visit at 2 other stores. I am sooo disappointed by this service. I have always had a bad service at this station, but I like it because it's more of a one-stop kind of a place. Train your managers, not only on the system but also on customer service. I am customer service customer myself, and never, have I ever, in my 12 years experience ever made someone feel the way I did today at your filling station