"He is who he is", Wastberg was quoted as saying in Saturday's edition of the Swedish newspaper Dagens Nyheter. "He is who he is". The literature prize and five other Nobel Prizes will be officially conferred in Stockholm on December 10, the anniversary of award founder Alfred Nobel's death in 1896.
The organizers now hope the musician will turn up to the award ceremony, which is held annually in Stockholm, Sweden (with the exception of the peace prize, which is held in Oslo, Norway.) Each victor receives a gold medal, a diploma, and a sum of money.
But Dylan has not returned repeated phone calls from the academy, nor has he publicly spoken about the award.
Bob Dylan has been labelled "impolite and arrogant" for failing to acknowledge his Nobel Prize for Literature.
Bob Dylan has a history of being erratic around prizes.
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He hit on 16 of 34 attempts for 143 yards with one touchdown and one interception. "I thought he's been OK so far". Kelly also dismissed speculation that he could return to OR after the season if the Ducks fire Mark Helfrich.
Academy member Per Westberg labelled Mr Dylan's reaction as "impolite and arrogant". "Right now we are doing nothing", Danius said. The academy has repeatedly tried to contact him but apparently failed.
A member of the Royal Swedish Academy of Sciences, Anders Barany, said that the award for Nobel Prize in Physics for Albert Einstein in 1921 also went unacknowledged.
Dylan, 75, is the first artist seen primarily as a songwriter to win the award, a fact that has stirred a divisive debate in literary circles.
Mr Wastberg told SVT, "This is an unprecedented situation".
James Wolcott, a columnist for Vanity Fair, noted that Dylan's lack of response was not the same as actively turning down the prize as some laureates, like Jean Paul Sartre, have done. A person whose name has been announced as the victor continues to be the victor even if he or she refuses to accept the award.