Going to this webpage on Your Stuff! > Your Texts > Stories, you will find the transcript, too. It includes a page with Useful Language and links to get more Useful Language on various topics!
Find the transcript here (path: talkingpeople.net – Enter – Skills – Writing – Letter-writing) Scroll down to Apologies. It’s 2 pdf pages, with notes I don’t read.
Read the transcript – C1 level