"We appreciate this will have been frustrating. Our teams have been working hard to restore services, and by Monday morning we could see that many people have now accessed their tickets – but that the problems are still intermittent. We're working hard on a full resolution and will continue closely monitoring the situation."
She said she did not know exactly how many people had been impacted by the outage.
"Some issues were widespread early in the day yesterday, and others limited to small groups of players or for short periods of time during the day."
In response to ire from customers, Lotto put a statement on its website, explaining why the choice to update on draw night was made.
"We did this for a couple of reasons; this is when all ticket processing for a draw is completed and we don't have a mix of players buying or checking tickets to make the move to the new system easier. It also gives us maximum time to make sure everything is working well before the next Lotto draw."
Saturday's jackpot was $10 million and was not struck.
The numbers in the draw were 31, 3, 18, 34, 16, and 30. The Powerball was 8 and the Bonus Ball 17. The Strike numbers were 31, 3, 18 and 34.
Powerball was not struck so will roll over to Wednesday night, where the jackpot will be $12 million.
First Division was struck, with three lucky Lotto players each winning $333,333. The winning tickets were all sold on MyLotto to players from Auckland, Nelson and Canterbury.
Strike has also rolled over and will be $300,000 on Wednesday night.
The Herald has contacted Lotto for further comment.
