Ikea opened on December 4 in Auckland to mass fanfare, with more than 800 people queueing up to be among the first to shop at the Sylvia Park store.
The delays to online orders have coincided with problems with payments being processed.
A spokesperson for Ikea confirmed the Swedish retailer has not been registering customers’ payments for a “small number” of online purchases.
Affected customers are being contacted and refunded within three to five business days of a query being opened for their order.
“We remain committed to delivering a reliable and seamless experience for all customers. Our teams are actively reviewing the cause of this issue and implementing improvements to ensure it does not happen again.
“We apologise for any inconvenience caused and appreciate the patience as we work to resolve this matter.”