It's rather easy to "hack your account", if a person just has a minute alone at your computer; copying a single torrent you downloaded from the site (to their flashdrive?) would give them a copy of your secret passkey, which they could then use to download any videos from the site… using your account.

Since (from what you are saying) it seems your account has been hacked, you need to change your password AND passkey, on your profile page, here: https://www.gaytor.rent/my.php

First change your password:

enter new:
Change password  []
Type password again  []

Then scroll down, and click the "Submit Changes!" button.

You should also definitely change your secret passkey too, otherwise that other person could just continue to leech videos, by using your passkey…

Now change your passkey:

...on the same page as above, at the top... check the box next to:      Reset passkey  [__]

Then scroll down, and click the "Submit Changes!" button.

Note that:
Any active torrents must be downloaded again (or edit the tracker, changing the properties/Tracker info over to your new "Announce URL, as shown on your member page) to continue leeching/seeding, if you change your passkey.

Alternatively, you could follow this illustrated procedure for reseeding videos (where you already have the video on your hard drive), which will replace the old torrent with a new torrent with your new passkey:
https://community.gaytor.rent/index.php?topic=6539.0

Good luck, and take care,
Pawpcorn
GayTorrent.ru