If you created a new account by accident, log out of Trendsales and go on your phone's browser (Safari / Chrome). Once there, go on Facebook.com and be sure to be connected with your normal account. Then go back on Trendsales and log in again.
If you are still directed to the wrong account, don't hesitate to write us through the Support-button that you find in the app or on the main page - we're happy to help :-)