Track changes apostrophe issue

Hello, 

I am looking for some advice/guidance on an issue I am experiencing with Word and the track changes function. When I am editing a document, Word is making changes that I have not asked it to do. It is repeatedly, in multiple documents, removing apostrophes and single quotation marks and then replacing them with the exact same punctuation mark. 

I have been in contact with the Microsoft tech team on numerous occasions, multiple different attempts have been made to rectify the issue, but it is still happening. 

I use and rely on Word and track changes daily for my job. I am self-employed so am currently unable to work and earn money. 

Any help would be greatly appreciated. 

Thank you in advance. 

Abbie