Bad Service

I am currently a consultant @ Justine and i was applying for Finance and i was rejected because i was told that am in arrears with Justine for 3 months.

I called their customer service center to enquire about this, and the lady that i spoke to said there is nothing they can do i must contact credit control. I asked her to put me through to that department but she said they don't take calls in that department only emails.

I sent 3 emails with no response and the automated response they send after sending them an email says they reply within 24 hours.

What suprises me is how is my account in arrears because i was paying on time and for August my order was only invoiced on the 24th of August and when i joined i was told that i have 21 days to settle my account from the day of invoicing. Today is the 10th and already my account shows that i have an overdue balance.