If you don't receive replies on your emails - check the details of the client

These people are ridiculous. We keep receiving emails from them with an attachment we cannot open as they obviously have the wrong person. I have emailed them back to say please check your info as you are contacting the wrong person. They do not reply. I called them. They cannot find our details on their system and there is no reference number on the mail, yet they keep emailing us for an account or whatever we do not owe. We are not who you are looking for. Wake up.