Impossible to do a simple backup restore from iCloud in a JB iPhone 5?!?

Hello all,

I have an iPhone 5 - 6.1.2 - JB.

I accidentally erased all texts (SMS / iMessages) from one of my contacts.

I noticed that I have an iCloud backup some hours before deleting the texts!

I would like to make a simple backup restore... not a FULL restore.. just the main important data (contacts, texts, etc.)...

I tried to ERASE ALL DATA AND SETTINGS but it sucks on the spinning wheel...

PLEASE, how can I make a simple restore from iCloud keeping Jailbreak and 6.1.2? Is that so freaking hard? I'm already sorry for not keeping my backups in iTunes! :(

Thanks!