1) I've submitted written letters address to consulates with applications consisting of my plans and intentions to visit the country i.e Italy and Greece, does the second time did they somehow knew about my first letter? perhaps by accessing information system and found the letters to be in a conflict?? if so would that effect on the decision.
I doubt they take the effort to check for the content of documens submitted with previous applications, but anything is possible.
2)Where to file the appeal and how to file as I can not find a Greek lawyer so I have to handle everything by myself,
Italian Embassy can be found in Islamabad - Ambasciata d'Italia
Ufficio dell'Ambasciatore
Segreteria Ufficio dell'Ambasciatore
Tel. 92 51 2833183 (centralino)
Fax 92 51 2833179
E-mail: ambisla.mail@esteri.it
Ufficio Visti
Tel. 92 51 2833185 (switch)
Fax 92 51 2833178
E-mail: visti.islamabad@esteri.it
Tel. 051 11181111
3)Is applying for a third Schengen estate is a good Idea in this circumstances?
I would see an appeal as better option.
4) which area of my application do I need to strengthen?
If you look at your previous visa denial statements, they point at the area which the issuing officer deemed as weak.
5) In my itinerary I've mentioned a flights and hotel booking to Thiland by exiting Greece but I have not mention the page number on my passport to see the visa to Thiland,
5) upon appeal will they disclose the exect reason of decline or do I have to assume a mystery field to work?
The appeal letter comes in about the same details as the visa rejection statement.