Channel manager doesn't respond

What do i do when the channel manager doesn’t respond?

No idea how long you are waiting but I suggest to send a new PM if they are active (check the recent contributions). If that doesn’t work PM an English mod, if that doesn’t work write the help center.
If it’s an old channel and you don’t see activities for a long period of time write the help center.

Sometimes people get a lot of PM’s, specially channel managers with a popular channel and they might have forgotten to reply to you.

It’s about for the temptation of an angel channel, the manager is not active for about 7 months and i pm to help center already but not an answer yet.
English moderator ? I haven’t thought that. Thanks a lot.