Worst processes for handling simple queries

I sent paid up letters and a clearance certificate 3 times. Each time they want this and that information added. I did all they asked and they still sent me a message to say they closed my query due to insufficient documentation received. They do not tell you what the information is or what is missing. They have the worst customer service and not one single consultant has a friendly voice or tone. This is by far the worst credit bureau that there is. Lack of enthusiasm to assist anyone to clear their name. Closing a query or dispute should come with the reason why at the very least. Now I keep having to call a call center and going through the lengthy verification and holding all because they dont try to make an effort to tell you what is missing so you can just email. Worst part their lines are all so bad everytime you call you can hardly hear what they are saying. The consultants need training as to atleast seem like they like their job and sound more helpful and friendly.