spam block required for x zero script

Avg Bid (USD)
Project Budget (USD)
$30 - $250

Project Description:
I am managing a classifieds site using script from (old version 4.97.4). Lately it is being overrun with spam ads, which are being posted by means unknown.

I need a successful solution to stop spam ads getting through. Anyone with knowledge on how to do this, please let me know your solution

it is an adult classified site -

Skills required:
Web Security
Hire steviemacsl
Project posted by:
steviemacsl United Kingdom
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