Magic Jack False advertising Internet

I have been using Magic Jack for ther past 2 years, never had an issue like this before and suddenly they want me to prepay for calling certain numbers within the USA.  They can not tell me what numbers or why, and the fact I was able to call this number before means nothing to them.  This is deceptive advertising because they just randomly decide to charge by the minute and that was the reason I gave up my landline and paid to have this number ported.  I think I don't need this anymore  My cell phone works just fine.  Good bye Magic Jack.  I won't be sharing anything good about you anymore...