Go to your profile -> Archives -> Select Month -> Click "Download PGN" at Chess.com.
Scenario 1: It is a local/club tournament (e.g., "SCG" = SCG chess club) Download SCGjd pgn
It is highly likely that "SCGjd" is a typo, a specific local club acronym, or a temporary filename. Go to your profile -> Archives -> Select
Go to your profile -> Game Archive -> Click the export icon -> Select PGN at Lichess.org. Scenario 3: You have the moves in a document and need a PGN a specific local club acronym