The Department may, after notice and a hearing, revoke, cancel, or suspend the certificate of registration of any telecommunications retailer who violates any of the provisions of this Act or regulations promulgated thereunder. The notice shall specify the alleged violation or violations upon which the revocation, cancellation, or suspension proceeding is based.
     The Department may, after notice and a hearing as provided herein, revoke the certificate of registration of any person who violates any of the provisions of this Act. Before revocation of a certificate of registration the Department shall, within 90 days after non-compliance and at least 7 days prior to the date of the hearing, give the person so accused notice in writing of the charge against him or her, and on the date designated shall conduct a hearing upon this matter. The lapse of such 90 day period shall not preclude the Department from conducting revocation proceedings at a later date if necessary. Any hearing held under this Section shall be conducted by the Director of Revenue or by any officer or employee of the Department designated, in writing, by the Director of Revenue. Upon the hearing of any such proceeding, the Director of Revenue, or any officer or employee of the Department designated, in writing, by the Director of Revenue, may administer oaths and the Department may procure by its subpoena the attendance of witnesses and, by its subpoena duces tecum, the production of relevant books and papers. Any circuit court, upon application either of the accused or of the Department, may, by order duly entered, require the attendance of witnesses and the production of relevant books and papers, before the Department in any hearing relating to the revocation of certificates of registration. Upon refusal or neglect to obey the order of the court, the court may compel obedience thereof by proceedings for contempt. The Department may, by application to any circuit court, obtain an injunction restraining any person who engages in business as a telecommunications retailer without a certificate (either because his or her certificate has been revoked, canceled, or suspended or because of a failure to obtain a certificate in the first instance) from engaging in that business until that person, as if that person were a new applicant for a certificate, complies with all of the conditions, restrictions, and requirements of Section 22 of this Act and qualifies for and obtains a certificate. Refusal or neglect to obey the order of the court may result in punishment for contempt.