To reopen a question, 5 people with 3k reputation must be convinced to click that 'reopen' button. The main problem is bringing attention to the question you want reopened, for closed questions are inherently less interesting than the others.
Reopening a question is much harder than closing one, that's true.
I suggest making your point on chat during a busy time (EU evening/US afternoon), when a lot of people are online. You also can bump a question through improving (editing) it, thus bringing it to the top of the homepage again, but I take it that wasn't enough. Finally, you can bring it up on Meta like you just have.
In closing, I'd like to point out that a question closed by a moderator (or an employee) can still be reopened by the community. If a mod wants a closed question to stay that way, she should lock it.
(All of the above obviously applies to undeletion as well.)