Mohit purchased a smart phone for Rs. 30,000 from a mobile phone seller on his verbal commitment that the smart phone will be replaced in case of any defect, within a span of six months. The phone started creating technical issues in spite of proper maintenance and upkeep of the phone. The seller denied taking any action on the complaint made by Mohit. Name the redressal agency under the Consumer protection Act where Mohit can file his complaint.