natis at working

The rating should be ZERO....I have been trying to call NaTis and to booking for licencing for about a week now and very disappointed how they operate those people do not answer calls their numbers just ring ********** / ********** / ********** . call center number also not working. The are offline most of the time and a very few station to book from. One number gos to voice mail and the mails are full you cant leave no voice mail at all.