MAYA 2020 - Couldn't name the issue, but please help!

CHEU_ser2021

I'm an absolute beginner of MAYA. I hit some kinds of the wrong keys on my keyboard and my poly mesh turned into a strange situation.
PS: I didn't add subdivision to the mesh.

Could someone please help me with that? How could I fix this mistake? I tried to redo these things but nothing works.
Thanks in advance!

Axi5

You pressed either "2", or "3" on the keyboard. Hit 1 to go back.
1 = Cage
2 = Cage + SubD preview
3 = Sub-D preview

CHEU_ser2021

Axi5 said:

You pressed either "2", or "3" on the keyboard. Hit 1 to go back.
1 = Cage
2 = Cage + SubD preview
3 = Sub-D preview

Thanks a lot!!!