There is an advisory from Loadcentral regarding loadcentral accounts that were locked:

Our System automatically locked the webtool of LoadCentral accounts that were not changed for a while. To unlock your account: create a new message on your LoadCentral registered mobile phone type UNLOCK (space) password send to LC access number 09229990214.

Please CHANGE PASSWORD after you unlocked and have accessed your webtool.

Please change your SL or Webtool Password by clicking on the Change Password. You must have different passwords for your SMS and Webtool-based transactions so your Webtool access will not be locked.

Please regularly change your SL or Webtool Password.