snags with caxton currency cards

I've had mixed experience over a few years using Caxton Global and caxton euro. Secondary cards are available to over 13s so ideal for sending your offspring all over the world. So you don't want them left high and dry. When they do text you from some far flung place at 19.30 to say that their card won't work when it has been happily working for over three weeks it can cause you to panic. caxton are not available by phone at 19.00 which is a real pain if it's an emergency and you been left with no money despite there being money in the account. I think the problem may have arisen due to the number of times the card has been used in the last few days. I vaguely remember becoming aware of this last year when I had two of them in Peru. Since they can't spend what they don't have i don't see why they have to shut the service without warning to anyone. And now that I'm trawling the internet and their website I can find no help. have to wait till the morning to investigate further. Useless!!!!