A year ago like you I wanted their no contract $249 unlimited deal and they said no guarantor no service. So I had a day off and wanting to ruffle some feathers as is my style I stopped by their head office and asked to speak to the manger.
A man and woman came down and as far as I could tell they had no official capacity, I assumed they were there to tell me to bugger off.
They had no authority to offer me anything but the rules… no guarantor no service.
I told them I will contact the NCC right in their office and they said OK and left.
So I did. After some back and forth they agreed to service with a $2400 deposit which I reluctantly agreed to as the service price was cheap