WHAT TO DO ?

It is the most incompetant company & people i ever had to deal with. They keep on threatening me with legal action about a outstanding amount on a some kind or other service that i app**** for, which i never did, but they can not send me any proof of where i signed for anything. I have tried often to contact them, but to no avail. Maybe i must take them to court, sew their pants off & see what they xome up with then.