An appeal from the Commissioner shall be taken only from an order on hearing or with respect to a matter as to which the Commissioner has refused or failed to grant or hold a hearing after demand therefor under Code Section 33-2-17 or as to a matter as to which the Commissioner has refused or failed to make his order on hearing as required by Code Section 33-2-23. Any person who was a party to the hearing or whose pecuniary interests are directly and immediately affected by the refusal or failure to grant a hearing and who is aggrieved by the order, refusal, or failure may appeal from the order on hearing or as to any such matter within 30 days after:

(1) The order on hearing has been mailed or delivered to the persons entitled to receive the same;

(2) The Commissioner's order denying rehearing or reargument has been so mailed or delivered;

(3) The Commissioner has refused or failed to make his order on hearing as required under Code Section 33-2-23; or

(4) The Commissioner has refused or failed to grant or hold a hearing as required under Code Section 33-2-17.