At least 650 Madonna fans in Chile have filed complaints with the national consumer board after a concert this week started late and ended early.
The consumer agency, which defends the rights of Chilean consumers, is talking with the concert organizer to determine why the concert started more than two hours late and was 40 minutes shorter than expected, a statement said.
The agency is also looking into whether the concert breached the terms of the tickets, at which point it could organize a lawsuit or broker a deal to compensate those who feel affected.
The concert Wednesday was Madonna's third in Chile as part of her MDNA world tour. It went on amid torrential rains that caused heavy traffic congestion around the capital, Santiago.
The producers said they skipped the first eight songs as they were waiting for the weather to improve to ensure the singer would be safe.