NOT ANSWERING PHONES

So i am trying to phone credit control the whole week allready with no joy, I try to email them, all the mails comes back undelivered.<br> <br> absolutely horrible service. Is there a number that a client can phone to actually speak to someone, I want to pay the account but there shows different amounts, So i made payment at the bank yesterday, but i have nowhere to send the proof of purchase to. I need this to be sorted out. I can be contacted via email.