Edit: I FIXED THE PROBLEM
Since one of my College Semester got over, we got some vacation time. I had lots of free time and the Pen Offset problem was still haunting me, I really love Plasma's DE and didn't enjoy Gnome's that much...
I did some searching around and decided to use Xorg Nouveau drivers instead of Nvidia's,
Then I ran Kubuntu on Wayland and installed:
libinput-tools
sudo apt-get update -y
sudo apt-get install -y libinput-tools
libwacom-dev
sudo apt-get update -y
sudo apt-get install -y libwacom-dev
After Restarting the Cursor and Pen Weren't offset, but in Wayland my Stylus lagged somewhat and the cursor would always freeze for a few seconds when switching from stylus to mouse.
Now I tried logging in using X11 and again, the cursor and stylus were offset.
But now, I decided to open Graphic tablet (Wacom tablet settings) of Plasma and tried to map the screen, I came to know that BOTH THE MONITORS
were mapped to my Cintiq resulting in the weird offset, so I corrected it by only assigning my Cintiq Screen as the drawing area for my stylus. And it Worked!
Here Is What I did: https://linux.org/attachments/screen-mapping-png.11933/