There were some problems at billing system, So we made a quick maintenance for this, and it is recovered now. (It is already done, additional maintenance is not needed.)
Sorry for your inconvenience during above time.
Have a good day. Thank you.
P.S: We well know that your inconvenience is still remaining and bothering. We are still setting a development team and preparing regular service, but it is not easy and has been delayed with some realistic reasons. But, we never won't give up this, and keep going. Anyway, we feel really sorry about this remaining delays.