VVM - quick to harass, but slow to investigate

I have been handed to VVM by Supersonic whose billing system is a mess. I have proof that my account is up to date with Supersonic but trying to get VVM to review this proof is almost impossible. I have sent it through to them and have been told that I am in a "queue" and it will be reviewed when the department gets to it. In the meantime the harassing SMS's continue. The only way that I can describe this company is nasty