Disappointing service at Direct Axiz

It's always disappointing dealing with Direct Axiz. 2 months ago they refused to update the ITC saying that the account has to be fully paid before they can do that. Dispite the arrangement that we had. Now the account has been fully settled and I am struggling to get a paid up letter. Sent a dozen emails and haven't received any responses. Tried calling their accounts department without any success. Called again this morning at 8:00am and got a voice message saying they are "getting a high volume of calls"! At 8:00am!!