I had some issues with GD. I didn't know you could buy "$2k to $4k" at a time. I bought $2500 once ($500x5) and got frozen. Took about a week to unfreeze. I tried each card a couple of times to verify they're frozen. It turns out that even a failed load counts as a "load" against your daily/weekly limits! ...? Counts against your limit but you don't get the money?!
They told me they freeze MPs whenever 2+ are bought at once. Found another place that allows CC purchases. Bought 2x$500 one day. Bought 2x$500 the next day. Went back the third day, and all MPs are gone!
C'est la vie...