Unable to download realm larger than 4GB.

I have a realm that is 4.4GB and I have tried again and again to download the world of this realm but have been met with the error message I attached. When this first begun, I contacted mojang support but was told there was no downloadble limit and that I was experiencing a bug. I was then told that there was nothing I could do aboout it but wait. It's been 2 months since I contacted mojang support and I'm still met with the same message again and again. I have tried basically everything from downloading the world on different devices, searching for related bugs, and waiting for it to resolve its self like I was told. So now I'm here trying to resolve this issue about this limit that supposedly doesn't even exist. Any suggestions?