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45-year-old Peter Hulands and his girlfriend were walking in Patong in the early hours when he was attacked.
Mr Hulands was reportedly defending his girlfriend after the cabbies made a remark about her appearance.
His mother's told the Geelong Advertiser her son may need reconstructive surgery after receiving facial injuries.
Mr Hulands is due back in Australia in a few days.
Three men have been charged over the attack.
Picture: Peter Hulands after his Thai holiday turned into a nightmare (Facebook)
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