Company that harasses people (sms, voice messages,...

Company that harasses people (sms, voice messages, postal mail, emails) for about twenty euros that an incompetent insurance company (which responds to the sweet name of eurofil / aviva) dares to ask me!
Insurer who takes the money from the client but who behind does nothing at all and leaves the client alone with his problem!
I am not far from turning against them for harassment because their method is strictly prohibited! Especially since the insurer received a registered AR more than a week ago and they do not even answer me ....