Law / Poland tourist visa refusal [10]

Hello everyone, hope you had a good day
I'm 24 years moroccan master degree student, i tried to apply for a tourist visa type C to visit my girlfriend and her family in Bydgoczsz but i got a refusal for two reasons:

*2.Justification for the purpose and conditions of the intended stay was not provided.
*9. Your intention to leave the territory of the member states before the expiry of the visa could
not be ascertained

i provided all the documents that i could give:
-Visa application form
-2 photos
-Valid Passport
-Travel medical insurance
-Flight air ticket reservation
-Proof of civil status
-Official Invitation letter for 2 months montioning that my host is in charge of my subsistence for the duration
-School certificate
-My dad's Pension statement for the last 3 months with a salary of 1000euro per month
-My dad's certification of holding a good (House holding certificate)

I don't know what else should i provide i was thinking about transfering some amount of money (4000euro) from my dad's bank account my personal account and provide a statement just to proof that i have enough subsistence, also i have another school certificate from a french university because i study in a private business school with double diploma.

i was shocked by the refusal after all what i provided and im wondering how to proof that i wana return to my country, that i don't have any intentions to stay in Poland

Please if you have any advise you're welcome, and thank you for your time