You might have to disable the 2 Factor Authentication for your account, provided you have more than one method of authentication. See the following article for more information. Look at the bottom of the page specifically
If this does not help then probably contacting support might bring out a solution. To contact support follow the instructions given below 1. Go to https://helpx.adobe.com/contact.html?rghtup=autoOpen 2. Wait a bit on the page that opens up, it should automatically open a chat popup. If that does not happen then look for a call out/chat icon at the bottom right, click over it and the chat popup should open 3. In order to talk to a human type "AGENT" in the chat box 4. If you are not able to get to the chat window, then disable your adblockers, firewall, enable cookies/scripts on your browser. If it still fails then change your browser/machine/network.
P.S. Be mindful of answering anyone who sends you a private message. See the following for more information about scammers https://tinyurl.com/y7cfrr7y -Manan