Thanks for that link. I actually shuddered at the thought of someone doing that to my hair again...
I don't think there will be anything you can do to tame the frizziness and improve the curl formation until you cut those razored ends off - no matter what products you use. I would definitely use the most gentle stuff you can find now to baby your hair, but I am pretty sure you will need to actually cut the ends off to make any change.
I truly had zero luck until I figured out what the problem was and just had them snipped off. Now, if I go to a salon the first thing I tell them is "NO thank you, I don't want my hair THINNED or RAZORED in any way." 'Cause sometimes they say "thinned" instead of "razored" (or at least that has been my experience) but it all equals the same frizzy, curlless mess in the end.
HG's: Dep Sport Gel used over a leave in (I alternate between a moisturizing LI and a protein LI, depending on what my hair needs) and Giovanni LA Hold Hair Spritz
Method: Air dry for 20 to 30 minutes, then blow dry the under sections for about 5 minutes for volume.
2/3 mix waves/curls - coarse, frizz prone, med. thick, porous, at-home color for gray, protein sensitive but I still need it sometimes, and I can't use glycerin in high humidity, NOT CG, wash with regular S&C 2x a week.