The las thing I know is swimming away as far as goes and waiting for 6 min or so. They will forget about you then.
By the way, who planed move? xD Just curious^^
this happens to me a lot too, and i usually tt a day ahead and then they ask me to move. but if you don't tt maybe just wait a day and they should probably ask to move.
I've had this happen a bunch of times. Usually when other villagers start talking about it you still have a couple of days but if it's someone I want to STOP moving I don't like to take chances. I use the swimming method - I dig holes to trap them (bridges work well), go jump in the ocean and sit for 5-10 minutes, then go back avoiding all other villages. I always get a moving ping, without fail.