Toshibabadu, welcome to the forum.
Steve2 nailed it - anonymous communications should be ignored and dismissed.
On the other hand, when the org's zealots come looking for you personally, have an effective "conversation stopper" ready. Otherwise, they will persist in trying to get information out of you - information which they will use to deal out "discipline" for abandoning the cult.
Simple but 100% effective - "I appreciate your concern, but there's nothing I can talk about at the moment. If things change, I'll call you. Thank you."
J.W. mentality demands that they must know "why you left the truth!" They hate loose ends, because loose ends make their "brotherhood of love" look very ragged - which it is.