The boxes filled with packaged and loose confectionary, and donuts cost anywhere between $40 to nearly $100.

The Commerce Commission has received complaints about Celebration Box, started by Waist Trainer millionaire Iyia Liu, after a slew of complaints on social media.

Celebration Box sells gift boxes online, filled with packaged and loose confectionery and doughnuts, and priced between $40 and nearly $100.

Liu, who also founded Luxe Fitness and Bambi Boutique, started the website six weeks ago but numerous disgruntled customers have complained about late deliveries, some boxes not arriving up at all, poor communication and being blocked on social media for complaining.

SCREENSHOT Celebration Box's Instagram post.

The commission would not specify the number or types of complaints it had received.

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On Tuesday Liu posted a message from Bali, Indonesia, to her friends and followers on Facebook sharing the struggles of running a fast growing start up.

SCREENSHOT Complaints have spurred posts about what is expected versus what actually arrives.

"In the past month we have had to scramble to find staff, we've run out of space to operate meaning we had to find a warehouse, we kept running out of supplies of EVERYTHING." she said.

Have you ordered from Celebration Box? Get in touch: anuja.nadkarni@stuff.co.nz

Liu was unavailable for a phone interview, but told Stuff on Friday she was struggling to keep up with demand. The business had grown from a few orders a day to 2000 a week.

"We have scrambled to hire staff, we now have a team of five full-time, two part-time and lots of casuals, we are trying our best to keep up with demand.

"Keep in mind we launched a month and a half ago, every single customer who has emailed in saying they are unhappy, we have provided a refund. I welcome you to go on to our customer service email to see for yourself."