"Note that any purchased Rebtel credit will expire after twelve (12) months of inactivity."

I'm one of their customers. My credit is gone without any reminders or notification. I have been left in dark until I tried to use the service yesterday and found out that my credit is gone. The credit is literally my money.

Comparing to what Skype does (https://support.skype.com/en/faq/FA10378/how-do-i-reactivate...), this is totally irresponsible and unacceptable to me. They provide no way of "reactivate" the credit.

So guys, be aware of such irresponsible service providers and check your provider's terms.

Found a settlement regarding to Skype's inactive credits back in 2010: https://techcrunch.com/2010/01/14/skype-credits-inactivity-s..., clearly Rebtel's behavior should be against the law.