14 day ban is not a big time , just wait.
If you really like to post so much , Remove any Signature from your Profile and do one liners/ unrelated posts freely
No, you will still be banned for that sort of posting, having a paid advertisement in your signature just draws more attention. People spamming still get banned regardless of whether they are paid to or not. Don't make the mistake of a lot of others here are, wait out your 14 day ban, don't try and ban evade, get your post quality up. And continue as if nothing happened, now knowing the rules a bit better now, so that it doesn't happen again.