(a) Every telemarketer shall, at a minimum, have the following policy:
(1) Accepting returns or canceling services for a period of not less than seven days after the date of delivery to the consumer and providing a cash refund for a cash purchase or issuing a credit for a credit purchase, which credit is applied to the account to which the purchase was debited in connection with the return of its unused and undamaged merchandise or canceled services. For purposes of this subsection, it will be presumed that goods were received seven days after they were mailed unless it can be clearly demonstrated that the goods were not received or received at a later date;