password - Recover encrypted home directory: login passwd changed, mount passphrase lost

I have made an extensive research through the site before submitting a new question, but on one side I'm a huge noob and on the other side non of the previous queries seems to fit my case.

I'll try to be as precise and concise as possible, hoping someone has a solution for my problem.

I tried to restore my old Ubuntu partition a few days back. I had an old laptop working with double boot HDD between WinXP and Ubuntu 14.04 in it, but about one year ago I couldn't resist to try Win8 and installed it over the WinXP partition. It obviously screwed up the boot loader but I didn't find the time to do the boot-repair untill now. Problem was that the LOGIN password didn't seem to work anymore. I say 'didn't work' instead of 'was forgotten' because I usually use the same Login password for all my users in all my OSs but the machine didn't accept it anymore.
After trying a list of about 20 variables (I usually use my stickers for inspiration when choosing the login password, i.e. my password should have been intelRceleronRinsideTM or SUSElinuxenterprisedesktop or HPsixhundredthirty or some variarion of those) I thought that the login passwd must had been deleted during the Win8 install [but then again, I'm a huge noob]. So... I changed it from terminal using the passwd command.
Now, as you might imagine, I can't log in anymore. When I type the right password at the login prompt, the GUI simply refreshes with no further explaination.

I understand that it might be a quite common problem, but all the other people had the decency to backup the mount passphrase somewhere safe but I, being the HUGE noob that I am, simply put it in a txt file INSIDE the encrypted partition... like locking the key of a safe inside the safe itself.
I know better now, but I still need to recover the INVALUABLE content of the encrypted folder now and I'm starting to get desperate.

I tried all the usual steps which are suggested in cases like these, but not knowing the oringinal login password and having the mount passphrase lost, everything was uneffective.

TL;DR:
My Home folder is encrypted and I need to recover the content. The original login password has been changed throug 'passwd' command, and the mount passphrase backup is lost.

PLEASE HELP.
PRETTY PLEASE.

PS: I can list all the failing methods I tried if necessary.
PPS: Sorry for bad english.

The whole point of encryption is to make it impossible to access data without the passphrase.

So there is no way to restore your data if you lost it.