Fix Small OSCLASS Plugin bug and small customization

I need someone familiar with OSClass to: 1- Fix bug with plugin Madhouse Messenger where the messages and inbox are sent and displayed in double (duplicate messagen username, inbox...) this happened after upgrade of plugin. 2- Change color of the messenger chat. 3- Make water mark image transparent (watermark on listings images shows black bg) 4- Translate a few strings left untranslated (i provide the translations, you just locate where to enter it in the files) DO NOT BID MORE $15. I need Extra Fast delivery. I hire immediately. (New Freelancers are welcome too, but only those familiar with OSClass and its plugins)