Certkingdom / They didn't provide support or refund
I have registered on Certkingdom. I have paid money for the program, which contained links and videos for the training. I could see them, but when I have already paid for it, I couldn’t open the program. I called to the technical support and they said that it was problems with this specific program. They offered me to get the same eBook, but I already had one. I asked to return money back and they still haven’t done it.