Realm Glitched

Hello, I play in-game as confusingGlitch and appear in the Discord as @gli7ch.
I would like to submit a bug report that although it looks cool as hell, it prevents me from placing blocks in specific areas of my realm.

Basically, I haven't played in a long time, and when logging back into my Realm, I was greeted with some sick corrupted generation!

Entire MOUNTAINS are gone, leaving just clumps of dirt and every patch of grass floating mid-air.
Rivers and lakes are now one block high, and everything underneath is air.

Biomes appear to have shifted as well! I can see many different colors of grass in many areas.
I can walk under the corrupted generation, but I cannot place any blocks.

There's also large patches of wheat everywhere, I'll be using this to feed myself.

I would like to ask for a full reset on my realm please.

If possible, can I choose a different biome?