SLOW SERVICE!!!!!

My account was paid up in April 2015 already and still it shows that I am outstanding because they fail to up date their system,now this is making my life difficult as I am trying to get a house but an account that has been paid up is stopping me.It is really inconvenient as I pride myself to have a good credit record yet I look bad for something that has been paid up months ago...It is your responsibility to let your client which in this case is Capfin know that we have paid up our account,not just accept payment and leave it at that..this has really affected my credit record and i want it sorted asap