Migrated data from RBS to datafiles but data still remains in FileStream

have a content database with RBS enabled on SQL Server 2012 Filestream. Migrated the data from Filestream to SQL with the script

$cdb = Get-SPContentDatabase <database_name>
$rbs = $cdb.RemoteBlobStorageSettings

$rbs.SetActiveProviderName("")
$rbs.Migrate()
$rbs.Disable()

seen the data being uploaded into the SQL (datafiles increased after migration)

checked all OK

$rbs.Installed() #shows true

$rbs.Enabled #shows false

run in SQL backend database

exec mssqlrbs.rbs_sp_set_config_value 'garbage_collection_time_window','time 00:00:00'
exec mssqlrbs.rbs_sp_set_config_value 'delete_scan_period','time 00:00:00'

However the data is still in the filestream store.

How do I get rid of the Filestream Store data (since it was migrated to SQL datafiles) ?