OK the pipe is vertical but it's not the main subject of this shot???
Very colorful composition.
It seems that your main subject is the colorful window rather than the cat. So, I would fix the verticals in the window and crop the pipe to put the emphasis more on the window.Nice contrasty colors
Ahmet, I agree with the comments above, Just fix the window and straighten it. You have the idea OK but the window is dipping to the right side. Give it a good crop after straightening the window.
Your edit looks better Ahmet