Feedback, Bad Attitude, Rudeness

I dont know where to start as I am FUMING as I am typing this complaint! I app**** for a limit increase on the 7th of January 2016. I sent through my documentation as requested. I got a message that documents were received and they will provide feedback. I followed up on the 27th of January 2016 and they said NO DOCUMENTS WERE RECEIVED.Finding it hard to believe, I then resent the documents on the 27th. I followed up today again 6th of February 2016, they still have not received my documents hence my application was declined. How is this possible when I am sitting with both e-mails that I sent with, and IT DOES HAVE MY PAYSLIPS ATTACHED!!! Please can someone follow this up and get back to.