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In which website you try to post the photo please? eg : flickr?
Are you using windows or a mac computer ?
Please post the photo you want to facebook (even it is upside down) then follow the steps below to rotate your photo :
Additional information : https://www.youtube.com/watch?v=4IUC5ZnQVnw
Please let me know the results
Would you like me to set up a remote session, which will allow me to connect directly to your screen and assist you quickly with this issue?
Have you tried my previous steps ?
Please open up the following link:
Join the session, then a remote file will be downloaded.
OPEN/RUN the remote file from your downloads (press CTRL + J to open up the Downloads window).PS - If we are not connected in five minutes, please reply back to me below.
Do you use a mac computer please?
unfortunately I can not access your iPhone remotely, You need to post the photo from a computer and then you can follow the steps below :
When you take picture with your iPhone Please note that the camera lens should be on top. Launch the "Camera" app and practice holding the iPhone in landscape mode. The position of the Volume buttons on the bottom may make it awkward at first. Place your left thumb on one of the volume control buttons and look at the screen to ensure your fingers are not covering the camera lens.
Turn the iPhone so the camera is using portrait mode. Note that the Home button is on the bottom. Place a finger of your left hand on one of the Volume buttons.
Take a picture and then tap its thumbnail in the bottom right corner of the screen to see it in the Photos app. Note that the photo is right-side-up.
Let me know if you need further help
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Click the "I agree" button then a remote file will be downloaded.
If you are on a computer, please login to your facebook using your email/phone number and password.
Click on the photo you want to rotate (or upload/post it again) then follow the steps below :
This is the link for the remote session : http://www.justanswer.com/remotedesktop/join.aspx?Session=032edc00-0120-4aea-835b-81128576abbf
Are you using a computer now ? do you use windows or mac computer please?
Please login to your facebook account, let me know when you do that
Ok, Please do not rate my answer.