The Warehouse says the Grocery Commissioner needs to chop-chop on reform.
The retailer claimed an investigation into Sanitarium briefly stopping its supply of Weet-Bix isn't happening quick enough.
Sanitarium kept up supply to supermarkets.
Warehouse Chief Product Officer Tania Benyon says combined with online grocery startup Supie failing - it's reason for prompt action from the Commissioner.
"He should really use the powers that he has to stop that. We want a fair and level playing field, and he is the person able to do that."
LISTEN ABOVE

Nicola Willis: Finance Minister brushes off worries about fast track for housing projects
07:22

Mike Casey: Rewiring Aotearoa CEO on shortage of electricians as solar panel demand soars
05:12

Richard Harrison: Auckland Transport Public Transport Director on CRL first weekday, Warriors this weekend
02:55