Hi @Milner_Household welcome to the community.
Please never try to upgrade more than one version at time, perform proper backup before doing so and don’t try to upgrade the system inside of the container (neither occ nor webupdater).
please find the right Docker upgrade procedure here:
recovering from the problem when you failed unsupported upgrade could be tricky but was discussed often in this forum, please use search function: Search results for '"Can't start Nextcloud because the version of the data" "is higher than the docker image version"' - Nextcloud community
maybe this is a good starting point: