Fax.Plus App *******

I downloaded their Fax.Plus App and got a free trial to send 10 papers, trying to send a fax, it didnt want to go through due to insuffiecient credits, decided I will buy 10 credits ********** After two more attempts my faxes still wont go through, always giving errors, I sent through email complaints and no contact was made to me,I am infuriated.