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"There were situations that are still being investigated by the EBU," they said.

"They told us they would get back to us and they haven't yet. It's a shame that the EBU takes so long in my honest opinion."

In a statement, the EBU said it was "very mindful" of the experiences of several artists at this year's contest.

However, the EBU defended its decision to expel Klein from the contest.

The EBU subsequently removed Klein from the contest, saying it would not have been appropriate for him to take part while a legal process was underway.