** Shares of Kogan.com rise as much as 7.2% to A$5.23, logging their largest intraday pct gain since late August

** Aussie retail and service business hits highest level since Oct. 10

** Co reports adjusted EBITDA of A$14.7 million ($9.57 million) for July-September this year, a 55% growth from the same period last year

** Posts gross sales of A$258.9 million for the same period, up 0.4% from last year

** Attributes rise in earnings to strong contributions from co's internet and advertising as well as mobile divisions

** Kogan down 3.3% YTD, including current session's moves

($1 = 1.5363 Australian dollars)

(Reporting by Nikita Maria Jino in Bengaluru)

((Nikita.Jino@thomsonreuters.com))