(feat): Delete all content if someone gets banned

Summary

Delete all content if someone gets banned

Steps to reproduce

(How one can reproduce the issue - this is very important)

Platform information

all

What is the current bug behavior?

content from banned channels stays visible

What is the expected correct behavior

The content from banned channels is deleted

Relevant logs and/or screenshots

(Paste any relevant logs - please use code blocks (```) to format console output, logs, and code as it's very hard to read otherwise.)

Possible fixes

(If you can, link to the line of code that might be responsible for the problem)