Damaged a section of my hair in Italy with my straightener - advice?

While I was Italy, I forgot to bring heat protectant for when I straightened my hair. I have naturally wavy hair and ended up using my chi straightener on way too high a setting a few times towards the end of the trip. When I got back and took a shower, I noticed that a part of the lower portion of my hair on my left side stayed straight while the rest was wavy. I realized I burnt my hair and damaged it and don't know what to do. I immediately cut off a little bit of my hair to get rid of some split ends that started appearing and there don't seem to be as many of them now after I started using some fortifying shampoo and deep conditioner. Does anyone have any advice for getting this portion of my hair back to its wavy self? Thanks!