The easy, quick option is to remove it yourself.
There's no legal agreement between you and VM, and in fact the original install was without your authority. With neither the correct permission to install originally, and no enduring right for the company to leave their equipment on your land you're within your rights to remove it. You're also within your rights to require them to remove it and do a reinstatement to your satisfaction.
See what the forum staff advise, they'll normally pass requests like this to the area field manager. Some AFM are very good and will sort things out quickly, some simply never respond and nothing will be done. As there's a H&S allegation there's a better chance of something being done, but if this doesn't get sorted quickly, just DIY.