Summary Companies Pick n Pay bets on change of CEO Shares fall 13% to 15-year low Retailer flags lower FY earnings Turnaround will be multi-year journey: CEO JOHANNESBURG, Oct 18( Reuters)-Pick n Pay( PIKJ.J) will review its strategy after the South African grocery retailer made a half-year loss, the new chief executive officer charged with luring back customers and restoring profits said on Wednesday.By 1134 GMT shares in Pick n Pay had shed 13.70% to 25.58 rand($ 1.35), its lowest in 15 years,