I tried to post two ads... They were both cancelled without any anyone there copying and pasting at least a vague response as to why - just disappeared. You're left with looking through a load of possibilities as to why.
Pro tip gumtree IT: You can use auto correct to replace a few memorized letters to give a common response to the email attached to the account so as to explain why the ad was cancelled... Ya, I get it... Customer service ain't your thing eh? Gets in the way of txting friends when actually doing your job gets in the way. Can't have that now can we...