I have an IDT Prime card. I have the same problem. i contacted IDT customer services & an assistant told me to fax my card details, to a number he gave me, + provide my address & a copy of my passport to have the annual maximum increased. He said it would take 24 hrs to 48 hours to activate.
Over a week later i still cant add money to the card, its automatically rejected.
Now I'm concerned because:
1. There is nothing on their website saying that you are required to fax your passport to increase reloading limits.
2. already provided my passport details online on the idt card idtprime site, so why did he need it again by fax.
3. They seem to have lost my details or it went to someone else who may use it illegally.
Really peeved at the lack of response from customer services , even though theyre only available week days in office hours.
Thats why I'm going somewhere else I think, becaue the card is useless if I can't add more money. Shame as it worked well for online purchases.
Thanks