I Had The Exact Problem so i was looking around in the towny chat.yml and i found this
modify_chat:
# This is used for when you don't have another plugin to format chat.
# or you want some other plugin to handle open chat, but want Towny formatting.
# It will cause Towny to overwrite any other plugins alterations to the format. enable: 'true'
# If true the chat formats will be read from below to allow per world formatting.
# These can then be altered individually.
per_world: 'false'
If you have essentials change this enable: 'true' to 'false'
1
modify_chat:
# This is used for when you don't have another plugin to format chat.
# or you want some other plugin to handle open chat, but want Towny formatting.
# It will cause Towny to overwrite any other plugins alterations to the format.
enable: 'true'
# If true the chat formats will be read from below to allow per world formatting.
# These can then be altered individually.
per_world: 'false'
If you have essentials change this enable: 'true' to 'false'