Sorry, but there is an system in place to apply for the DTV, if you do not like to follow those instructions, simply tell you husband to go and live in another country where they have rules which you like.
AS you managed to upload a few documents and showed the money in the bank, I can not see any problem to show them again at immigration, to get a 180 day Extension of Stay.
Same documents, so if they where genuine it is a piece of cake.
The reason you got this stay changed and as you signed to inform the Immigration officer when that happens, why do you think you are allowed to change the rules?