I think your safe to pay via take email payment. I payed this way, and had no issues. Pretty much they just receive a payment from an email address. The sites listed on the official resellers list are generally trustworthy; it's extremely unlikely you'd have your information stolen.
This thread might help.
Could you give a few more details? N3DS or O3DS? SysNAND FW version? EmuNAND stopped working after an update?
okay thanks so much for helping me