What did you expect? that things would run smoothly and you would get your certificates in a timely manner at a discounted price?
c'mon, you are dealing with a Greek flight school, that should be enough warning. Don't go there or any of the spanish schools for that matter.
I have been corresponding with Egnatia and Aerodynamics Malaga, what a waste of time. Poorly educated staff!!!
I hope this serves as a reminder NOT to go to southern Europe, and if you do... DO NOT!! pay in advance, gives you the option to vote with your feet WHEN they don't honor their promises.
Do not accept extra rent charges as a consequence of their poor planning!