Not much of a big deal, should've just left and not joined back to begin with. They don't really have to give an exact reason as to why they might of not wanted you in the channel, which is why I have no idea as to why you kept asking when they clearly said stay out the channel but was refusing to do so, from what I've seen.
As for the "fuck off", that's like nothing, let alone a speaking to about that. It's quite a pathetic thing to bring up upon someone else when you do the similar things yourself from what I've experienced, which now makes you sound like a complete hypocrite.

Not much of a big deal, should've just left and not joined back to begin with. They don't really have to give an exact reason as to why they might of not wanted you in the channel, which is why I have no idea as to why you kept asking when they clearly said stay out the channel but was refusing to do so, from what I've seen. As for the "fuck off", that's like nothing, let alone a speaking to about that. It's quite a pathetic thing to bring up upon someone else when you do the similar things yourself from what I've experienced, which now makes you sound like a complete hypocrite.