Type font changed on its own - how to change it back!

[jeffn9200602]

I opened a new letter on my Mac from a company I work with, and Adobe changed it to a difficult to read font, with random lines with yet a different font. I even opened a 2 year old letter and it changed that one too. Why did it do that and how can it be corrected?

Why is there not a phone number I can call?

I spent almost 3 hours on the phone with Apple about this, and they cannot help me.

[Test Screen Name · Accepted solution]

If by "Adobe" you mean the free Acrobat Reader there is no free tech support, and hence no phone you can call. Is that what you are using? What version exactly?