Useless accounts department

Been struggling for almost a week now to "unblock" our Payroll account. We have an annual subscription but all of a sudden our account is blocked due to non-payment of monthly invoices??? If you call them the only answer they know is we must email them. I have emailed numerous times and various people. NO ONE responds. The only thing that happens is someone might forward the email to someone else asking them to attend to our query. And guess what happens then...NOTHING! How is one supposed to do business like this? We have to pay commission salaries but now nothing can be done due to our account being locked. Absolutely pathetic.