How Do I make changes to the email reminder notification?

Hi Admin,
how are you? hope you guys are still staying strong with all the issues flooding in! right, for me, I've just received a reminder on my own listing that is about to be expired.

So i didn't really like the way it was being structured (format) can you show me the way 'step-by-step' in wordpress on how I can get it done, I would also like to add in a logo (jpeg) with links too.

greatly appreciated!!
yours,

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Dear [email protected],
Your ad has expired. We inform you that, if you are interested to reactivate your ad,
Login in our website and reactivate it.
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Listing Title: Volkswagen Golf GTi
Login On: http://www.isniffy.com/wp-login.php?action=login
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Website: iSniffy
Website URL: http://www.isniffy.com
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Hello,

We are fine calvin and welcome back again.

You can change mail message through.
classicrafttheme\library\control\cc_expiry.php
and make changes in that file.

 

Cool! Thanks Nitesh! But I better not, it says that if i make changes my warranty will be void.

 

Hello,

You can makes changes in the file as suggested above, It will not affect your warranty because we are suggesting you to make those changes.
But we careful while editing that file. Make changes only in message text include your image URL in message .

 

Cool Gourav! Thanks mate. erm..maybe later, cause I couldn't think of something nice to say or alluring...
you can close this mate.

cheers