Harassing me with SMS of Legal Action,NO Feedback

I keep on getting SMS's for VVM on behalf of AUTOPAGE stating of further legal action. Yet when phoning the number provided in SMS it just cut you off and you cant speak to anyone. I also have sent around 30 emails with no response at all, only acknowledgement of mail receipt. Then thereafter a email stating case closed. To date I still have not received any proof of this so called outstanding account. or even a copy of the contract to proof that I owe Autopage any money.