1 - Log in to www.etxt.co.zw and type in your phone number and password.
2 - Once logged in, select the option to link FACEBOOK account and then link your Facebook Account.
3 - Click on the Facebook icon and select the option I need to reset my Facebook linkage.
4 - You will be prompted to reset your Facebook link and to proceed select Yes.
5 - The message “etxt from Econet Zimbabwe would like to manage your messages” will appear and you select okay.
6 - After that, you will receive a message Congratulations! You have successfully linked your Facebook account to eTXT. This will enable subscribers to post and receive Facebook wall commands or chat.
7 - If the linking does not work, please remove the eTXT application in - Facebook and the relink.
All eTXT subscribers using Facebook should perform this action.
Source:
https://www.facebook.com/notes/econet-zimbabwe/how-to-relink-facebook-account-with-etxt-account/446468385435713
