If you wish to apply for rollback you may here, but remember READ THE REQUIREMENTS.
You must have at least 20 edits in order to request, and your request must be at least 3 sentences long explaining how you know to use the powers and to use them with good power and not abuse them. Also if you were blocked at least a week past, you must wait a week to request for rollback. You must have been actively contributing mainspace edits for at least a week.
If your first request for rollback fails, you must wait 5 days until you're eligible to request again. If you are making a second request, remember to put /2, /3, /4, etc.