The most *********** cellohone contract

HI Peter i did complain previuosly and to my surprise i did get a response they will call me back. Well again empty promises and still they keep on deducting money. What should i do to get this thing cancelled, change bank accounts and be blacklisted as Mrpmobile is obviously incompetet just to cancel a contact. Could they give me proof where i choose to extent past the 2 years and receuve a new ohone as i keep on paying foe atuff i dont get