How much should I tip my hairdresser when my service is already $585 dollars?

Today I walked out of the salon paying $700 dollars !!!! Ugh. My service was $585 dollars. I got a bleach out which is this beautiful white blonde & 3 rows of extensions that were $100 for a row … so I paid $300 for the extension part. At the end I still tipped 20% of $585 which was 117 dollars. Im beating myself up thinking about it. Yes… it was exactly what I wanted, however another stylist put my extensions in because my current stylist is out… and they weren’t exactly the best placement. Anyways… how much are we suppose to tip on top of such an outrageous price? I never want to be insulting, but an extra hundred on top of what I’m already paying is actually insane every eight weeks. 😫😫😫 Please let me know what you guys tip your hairdressers. & if I was right to tip 20% and should I continue to do so? I just feel guilty every single time i get my hair done spending money like this. (trust me this is one of the most affordable salons in my area) TIA 🩷