Possible Clues:

• "This can't be," in texts
• "Unbelievable," in a text
• Texter's "No way!"
• Texter's 'No way!'
• Texter's ''Unbelievable!''
• “I can’t believe this,” in a text
• "Tsk," in a text
• [facepalm emoji]
• 'i have no words, ugh'
• "I disapprove," in textspeak