@lakotaubp Sorted. The phone was not booting to recovery mode by pressing vol down and power. So tricked it by failing the upgrade from settings which took me to the recovery screen. The installer worked from there with wipe data and reflash partitions not selected. Data intact, now at OTA-23 and happy again😀
Would the 'un-brick' my Volla X route be to go back to the stock software given above (on halium9) and then install the latest OTA from the installer with the 'flash partition' option selected?