Game created copies of old worlds, they are corrupted. Quantities of copies has flooded cloud storage and stopped it working

The game appears to of created duplicate copies of old worlds of mine. These are all now corrupted. It has only stopped creating more copies when its reached the cloud storage limit. This has shut my cloud storage down and no longer getting cloud back up on my main world 4 years old. It wont let me delete or interact with any of these copies of worlds. It attempts to sync user data and fails. Cloud not working as result.