Blocked snapchat accounts

Hello guys i just had a look and it seems that a lot of guys are good with accounts and recovery!

Long story short, i have to sue a “friend of mine” and his girlfriend because they owe me money.

This issue im having is on Snapchat because the person blocked me on snapchat and deleted messages before i was able to take pictures of it for evidence!
(Believe me, i tried the recovery my data method but nothing is appearing on my end because i think he gas to unblock me and then i can see the “delete.status.message” smtgh like that.)

And now i cant acces the conversation of both of them because i accidentally logged out of snapchat!

Any recommendations or any help would be highly appreciated!

Beside that, I want to wish you a happy Wednesday!!