Unless an appeal is withdrawn, an appeal tribunal, after affording the parties reasonable opportunity for a fair hearing, after notice of not less than seven days, must make findings and conclusions promptly and on the basis of the findings and conclusions affirm, modify, or reverse the determination or redetermination within thirty days from the date of the hearing. Each party promptly must be furnished a copy of the decision, including the reasons for the decision. This must be considered the final decision of the department, unless within ten days after the date of mailing the decision a further appeal is initiated pursuant to § 41-35-710.