That's what u get for buying a shitty Chinese clone

 

Your Welcome now get a proper card

https://nds-card.com/ProShow.asp?ProID=575

 

And you shouldn't have to. They're all Chinese made anyway, so I'm not sure where this "shitty Chinese clone" idea comes from.

Anyway, I think there might be a possibility of using the wrong firmware?
I had a look around using the info you provided. This may be of help; https://github.com/ntrteam/flashcart_core/issues/14

Links to here for firmware: http://r4i-sdhc.com/downloade.asp

I hope this helps. Good luck in your search!

 

You are the third person with a blocked flashcart on a DSi in the last few days. Did you try to update the flashcart firmware (≠ kernel) on a DS-(Lite|Phat)?
Downgrading a DSi is possibly but a horrible idea in my opinion.

If there is no 1.4.5 firmware update for your flashcart and you do not want to get a new one this leaves:

Installing unlaunch – only takes a few minutes: https://dsi.cfw.guide/

This disables the whitelist and signature checks and could possibly get your R4 usable (at least it worked with an Acekard 2i for me – which is blocked by 1.4.5). If you only want to get the flashcart working you can stop following the guide after installing unlaunch. But installing HiyaCFW and TWiLight Menu++ (a bit more work) is a good alternative to a flashcart.

Even if you do not want to use Hiya/TWilight please do not skip the NAND-backup step before installing unlaunch.

One warning: unlaunch does some non-optional(!) patches to the System Menu not everybody likes:

• No "Health and Safety Warning" screen
• No music and no sound in System Menu

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There will not be any update