Into the city and back

We enquired at the hotel about getting a bus into the city thinking that this would be the most economical use of our few remaining New Zealand dollars. We were told that the bus would cost 32 dollars each one way but a taxi only 35 dollars for us both. So we asked the receptionist to order a taxi, and while waiting changed some US dollars we'd had since the Costa Rica trip for more Kiwi currency.
The taxi driver was a nice chap, although we struggled with his accent and wondered about his origins. He said he'd be happy to take us back to the hotel when we were ready and we agreed that we would call him around 9pm. He scribbled his number on a card.

Later, after we'd had a taster session in the city, strolling along the waterfront and going up the SkyTower, we tried to call the taxi driver but the number he'd given us - and all the possible variations - was unobtainable.
The business card the number was on had another, printed, number for a firm called Discount Taxis. We tried that number: unobtainable.
At the next taxi rank Lawson enquired about the fare for the journey to the hotel and was told 66 dollars. Although 31 dollars more would not have been significant given what this trip has cost us in total we decided to make another attempt at contacting the original firm. We knew the hotel had the number.  But what was the number of the hotel?
It was while we were scanning tourist accommodation leaflets in the foyer of the closed i-site that Lawson thought about looking on our room key card. There was the hotel's number.
Once we contacted the hotel it was not long before we were back there having paid Discount Taxis  35 dollars for the fare. Cash, of course.