The worst service ever!!

<p>I app**** for a credit limit increase on 05.05.2016 and sent my documentation as requested to ***. I contacted the call centre to finalise my increase as was told to resend my documentation as they have not received it. I resent the documentation on 06.05.2016 to the same email address. I contacted the call centre and was told that they cannot locate my documentation and instead I should send it to *** which I did. I was told by Krishni that I could call after 15 minutes. I contacted the call centre after 45 MINUTES AND ONCE AGAIN WAS TOLD THAT THEY ARE UNABLE TO LOCATE MY DOCUMENTATION!!! What do I need to get an increase on my credit limit? I've sent the documentation 3 times, is that not enough to test any paying customer's patience???</p>