Final spell I needed

I decided I wanted to get all of the spells and level all Magicka skills to 100. The last spell I needed was Guardian Circle. First of all, figuring out where Colette Marence had disappeared to was some work (apparently it’s a common bug according to UESP), but I was able to get her back to the College. I finished the Restoration Ritual Spell quest, I go back to Colette to buy the final spell I need, and she doesn’t have it. Apparently this is ANOTHER common bug with her. Unfortunately I didn’t have a save from before I started the quest and I’m playing on Switch, so I just have to accept I will only be getting 99.9% of the spells 🥲 it just works