The 24-year-old agreed his £5.5million move to St James´ Park last week, but a row over a £300,000 pay-off to which he was contractually entitled if he was sold without asking for a transfer has prevented the deal going through.
Allardyce told the Manchester Evening News: "They are out of order. This is a private matter, a confidential issue that should not have been made public. I´m flabbergasted and want the situation resolved."
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