Mr Unsworth, a veteran cave explorer who said he first travelled to Thailand in 2011, added Mr Musk’s tweet was “very hurtful”.
“I find it disgusting,” he said. “I find it very hard to even read the word, never mind talk about.”
Mr Unsworth first travelled to Thailand in 2011 with his girlfriend Woranan Ratrawiphukkun, known as Tik.
He said as a result of Musk’s tweet, his name is “tagged with being a paedophile”.
Mr Musk insisted the phrase “pedo guy” was commonly used in his native South Africa and meant “creepy old guy” and not that Mr Unsworth was a paedophile.
His lawyer, Alex Spiro, said if people had received “pedo guy” as an allegation, Mr Unsworth would have been shunned by society, instead of meeting politicians, invited to speak at events and awarded an MBE.