Can't convert to curves!

Hi, wonder if anyone can help...

I've managed to fit all this text nicely inside the figure of 8.

When I 'convert to curves', all the text jumps outside of the 8.

Whatever I do, I can't get the text to stay in the 8! I need to resize the 8, but the text moves around and shrinks if I do so without converting to curves.

How can I keep at the text fixed inside that 8 so I can resize it?!