I recall that you can ask not to be mentioned in an RP after you leave -- however, I would also like my previous actions within an RP to be struck out and rendered null and void as well. OP, however, is trying to keep considering those actions as canon.
Now, I hold immense animosity and contempt for this particular OP in particular and would like to know if I can I request that my involvement in an RP in it's entirety be rendered non-canon -- as in, not just 'don't mention my name' but 'everything I ever did in this RP will be considered non-canon'.