ISTANBUL (Turkey), June 19 (SeeNews) – A UK court said it will extend until July 30 the deadline by which Turkey's Cukurova Group should repay $1.57 billion (1.16 billion euro) in debt to Russia's Alfa Telekom Turkey Ltd (ATT) to recover its stake in Turkish mobile operator Turkcell Iletisim Hizmetleri [BIST:TCELL].