The Springboks called the rendition before the match a "joke"
The reggae singer whose tuneless rendition of South Africa's national anthem was savaged by rugby fans has said his performance was "sabotaged".
Ras Dumisani said the orchestra played too fast and his microphone was too old at his performance at a South African rugby clash with France on Friday.
The team went on to lose the match, with some blaming the singing for contributing to the 20-13 defeat.
The South African-born French-based singer appeared to forget the lyrics.
He also struggled to hit the high notes and many in the crowd in Toulouse began to laugh.
The vice-captain of the Springboks Victor Matfield called the rendition a "joke".
But Mr Dumisani blamed the match organisers for his poor performance of the anthem, which incorporates five of South Africa's 11 official languages.
"I was not feeling good because I felt they wanted to sabotage my concert," he told South Africa's 702 radio station.
"I want to apologise to all the people at home. I find myself disgusted."
The South African Rugby Union has written to its French counterpart to express its dismay.
"As a union, we were shocked and horrified by the rendition of the anthem," Saru President Oregan Hoskins said.
"The performance of the anthem is a treasured part of any rugby international and we take great pains in this country in the selection and rehearsal of artists to ensure that we appropriately honour all anthems."