The only way to get Hand History is to send an e-mail to PokerStars support team:
In the letter you'll need to indicate your PokerStars account name and a period which you want to get the tournament hands for. Please note that PokerStars store this information in larger databanks so always set the start date a couple of days earlier then actual start date in order to get full Hand History.
Example of enquiry:
Subject: "URGENT: hand history: MyPSNickname"
Body: "Dear PokerStars Team,
I'm writing to enquire about hand history for my account MyPSNickname for the following period: 24 may 2017 - 20 jun 2017.
I'm okay if the period would start earlier and thus the file would be larger. I just need it to contain the specified period (even if it takes several archives). Please send me this information ASAP by e-mail. I'm looking forward to your reply.
If you want to share the Hand History with us, send us the link to it (not the actual archive as it is quite heavy).