Naturalização denied.. What now?

Hi aguys,

Hope I can get some good advice..  Couple of months ago, I received notice that my naturalization request was denied based on the grounds that I didn't know Portuguese, even though I am conversational.

At the time of submitting my original request, I was given a sheet of paper describing the length of time that the whole process would take to complete (I think it was approximately 6 months in total).

I submitted all the required documentation in 2017 before there was a change in law stipulating that you had to present the CELPE-Bras certificate.

The time of this process took way longer than their estimated 6 month and was more like nearly 3 years.  During this time there was no movement and only in the last 3 or so months I was asked to produce the CELPE-Bras certificate or some other options (like BR university degree etc).  Now, I know that to sit the test takes some study time as well as the fact that it is only held twice a year.  So this needed to be planned in advance.

They denied my request due to not being able to present this certificate.

I appealed stating something along the lines of (1) based on the time taken for the process and the fact that (2) I entered my process before the major law change, even though there has been a number of additional legal amendments/requirements made during the term that I was not made aware or informed of.  (3)  I would have to mark the date for the next exam which would push the process out even further so that I could present the certificate, that (4) I should be approved based on the law standing at the time that I submitted my naturalization request.

Again, they denied my appeal just stating that I did not know Portuguese.

Me and my brazilian wife are trying to understand what this now means..  Is there anything that can be done now?  Or do I need to start the process all over again - That seems quite unfair.

Thank for any constructive advice!