Small change needed to my first 3d model

Attached my 3d model, i'm not a 3d designer so i need a little help.
This model is a brooch to hanging to the t-shirt of my employees. I need to add, to the back of the brooch, two small rings to support a safety pin.
Can someone help me?
Best regards.

Hello,

did you have any other 3d file formats you could upload here?

I have no working tools to convert your x3db- File,- so i can see the model, but i can´t modify it.

Which file format do you prefer?
i will try to find the right tool.

Try file format:
stl, stp / step, ipt, , stl, sldprt / sldasm, prt

stl format attached.

Like this?:

https://skfb.ly/ALNw

I know,- only the letters are connected,- not the hat

Great! But hat also the hat has to be connected, and the borders of the characters needs to be flat.

It was easy to flat the surface.
...But i couldn´t smooth the borders.
Didn´t you have s a simple 2D drawing of that,- with a usable contour /shape?

I'm sorry Aka but for personal affairs i will be far for a couple of weeks.
I will write you in september, thank you for your patience e see you later.
Sergio