There is no way to resend an email or SMS in ScholarPack. You will need to create a new message with the same body of text. Click here for information on sending out a comms message.
You can however copy/paste message content from the comms log should you wish. To do this, go via Admin > Comms > Logs and navigate to the message content you want to copy.
If you are copy/pasting the message, please make sure to double check the content doesn't include private or sensitive information that should not be sent out to other contacts before you send the message.