Drink-driving charge - licence suspension already served, can I drive before court?

I was stopped by Police in New Zealand and received an immediate 28-day licence suspension. My blood alcohol result later came back above the criminal limit and I have a court date in July.
The 28-day suspension period has ended, but I'm unsure whether I can legally drive before my court appearance. A police officer told me I could not, but I haven't received any further suspension notice.
Has anyone been through a similar situation in New Zealand?
Were you allowed to drive after the 28-day suspension ended and before court?

Did the time between the end of the suspension and the court date count towards any later disqualification?