With accounts that are less data-miney, you can replace all your account details (name, email addy, region, etc.) with gibberish and wait for it all to update, and then replace your password so not even you can get into it.
If it’s more data-miney and you are willing to put in a few months / years of maintenance, you can trickle in the gibberish and false data until it’s thoroughly poisoned.
They may already have your data today but as soon as you can cut off pipelines that data starts getting stale.