Hellas is nothing more than a 'trading name'. Air Miles is a broker who uses the Hellas brand to lend credibility to his 'virtual airline operation'. Until recently they did not even have an AOC. A previous AOC had been allowed to lapse as the company does not own or operate any aircraft. No aircraft - no AOC !
For the time being they have managed to talk a Latvian outfit (LAT Charter) into providing a subservice for the next six months (using an A320). What happens after that, is unclear. Probably a repeat of last year's procedure. Aircraft goes back - AOC lapses !
The fact that they did not have an AOC until a couple of weeks ago made some of their tour operator clients very nervous. Some of their early flights in March had to be operated on full charter by other carriers in the region.
If you need to charter an aircraft in Greece, there are at least two or three established carriers that you could use.
If you are looking for charter capacity feel free to send me a PM.
CG