Samsung Galaxy S2 boot loop

Samsung Galaxy S2 boot loop

Today I updated my S2 with the android version provided by the carrier,
but I thought it went wrong because of the lack of space on /storage and
afterwords some of the apps lost their settings. Also after the update all
the apps started to have disk space errors when trying to update, so I
deleted some of the apps or moved them to external sd, but still had
little space on the 2Gb partition. I looked for a rooting solution and
since I'm on Ubuntu I downloaded Heimdall. I downloaded the latest
firmware version for I9100 from sammobile.com and in console I ran the
following command (saw this in a tutorial)
sudo heimdall flash --factoryfs factoryfs.img
And I got this error
Uploading FACTORYFS
21%
ERROR: Failed to confirm end of file transfer sequence!
FACTORYFS upload failed!
Ending session...
Rebooting device...
Re-attaching kernel driver...
Now everytime I try to boot my phone it goes into recovery mode.
How can I get pass the booting sequence and install a new and functional
android rooted version? Am I missing something in the process, is my first
attempt to root my phone.