I have a charge for 69.99 for adobe reader. I did not order this

You must have. charges don't happen magically, you. must have done something to prompt it to happen even if you were not aware of it. If you downloaded the adobe app its free trial would renew into a paid subscription unless you cancelled it.

Click here to cancel it: ➡️ If you want to cancel a subscription from Apple - Apple Support

Then here to request a refund from Apple: ➡️ Request a refund for apps or content that you bought from Apple - Apple Support