.ai files are Adobe Illustrator files. You will need to open and edit them in Illustrator to the size and other edits before bringing it into Photoshop.
I see you have an Adobe account under the same Adobe ID as with forums. As you mentioned about the distorted image, I tried to replicate the same at my end and the image seems distorted when opened in Photoshop.
I have added an image credit to your account so that you can license a different image instead.
Hope that helps.
Feel free to update the thread for any other query.