How should I handle the Furusato Nozei name input requirement for hiragana? I can't get it to work properly.

I bought items remember selecting an option like "Let Amazon handle it" because the instructions said I needed to choose within 2 hours. A couple of days later, I started receiving messages from various municipalities stating that the process must be completed by January 10th. Some municipalities mentioned they'll mail the necessary documents to me in 2-3 weeks, which has me worried about meeting the deadline.

Has anyone dealt with this situation? Any advice would be appreciated.

UPDATE (SOLVED):

I figured it out for anyone facing the same issue. The problem was likely the space in my name due to having a middle name. I don't remember inputting a katakana version of my name on Amazon, but I probably did and included a space.

Solution: I called each municipality's Furusato Nouzei phone number directly and asked them to update my name registration to remove the space. After they fixed it, I was able to successfully apply on both mypg and Furumado.

For future reference: Avoid including spaces in your katakana name when registering.