API Error when searching my username on the stats page

Hey everyone
So I've been having this issue since the API update came out in october, tl;dr is I cannot view anything on my stats page (username is c_n), it just throws an axioserror 400 (which as far as i know is a bad/malformed request)

I've already e-mailed support a while ago and explained the issue, as well as adding some additional context (such as letting them know that, before the API update, my username would show up twice if you looked it up, and one of them would throw the same error), but I got no response unfortunately

If anyone finds this even remotely familiar and has some solutions to try out, feel free to suggest
I'm probably gonna poke support again in the meantime

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Oh and this might be related (or not) but:
I've started playing wynncraft this august, but before that I had joined and played a bit before- my first login was in 2013 (don't remember when exactly, probably late 2013)
However something really strange happened when I joined back this year: my profile was wiped clean
Even in the brief period of time where I could look up my profile on the stat page, I knew that I had joined before and had played other classes

This screenshot was retrieved by a friend of mine and its from 2017 - you can see the different classes and such
But on my current profile i have no warrior or mage, and the archer that I've recently been playing was made a week or so ago
So yeah, I am completely stumped on that - and to be clear: I am not asking for those classes to be reimbursed in any way, just thought it was interesting and might be related with whatever API shenanigans are going on