I think people are being dismissive. OP should be able to access their account, period. Yes, they can check it externally but maybe they have their own reasons, like uploading evidence. I only received emails and my husband received a mix of emails and text messages so it's important to keep your contact info updated.
You should be able to get the access code. I never received mine in the mail so I made a request and they sent me a new one. 700 days with no word is way too long, something is wrong.
Are you using the right receipt # for the right user? For example, if you are the petitioner, you are only allowed access to the 130. If you are the beneficiary, you are allowed access to the other forms. Perhaps you're trying to get something you're not "allowed" to have.