The organiser of Yuja Wang’s Hong Kong concerts has apologised and offered full refunds after a last-minute programme change resulted in the pianist performing for just over half an hour at a concert, leaving audience members feeling short-changed and prompting complaints to the city’s consumer watchdog. Audience members were angered by the withdrawal of Alexander Tsfasman’s “Suite for Piano and Orchestra (Jazz Suite)” from Tuesday’s concert at the Hong Kong Cultural Centre’s Concert Hall in...