Versatile font

[The Total Package]

Let's say I chose Harming Font, then took Versatile Font, could I then qualify for Restorative Channel or is it still blocked out because you need Healing Font specifically?

This is assuming the Deity offers both Font's of course.

[Nelzy]

RAW no, since you did not take the required option, you only have the options to prepare both types anyway from Versetile font.

If it was not for "Once you choose, you can't change your choice short of divine intervention" you could have just retrained and there would be no issue, but since they obviously wanted this choice to matter more then regular things and did not include in Versatile font that you also qualifies you for feats (if it an oversight or not we dont know)
im afraid you are out of luck.

For example they could have written in Versatile font that you now qualify for feat that require both, but the did not, they could have written in the requirement of Restorative Channel "healing font or Versitile font" aswell but did not.

Everything points to that they really wanted that choice to be binding and something you would need to plan ahead for.