Why are my lips tilted toward one side and what can I do about it? (Photos)

The left side of my lips is droopy. also when I close my moth lower right side of my lips seems to be thicker. in past, I had very bad orthodontic treatment which ended up in the removal of three teeth from one side (one from the upper left jaw and two from lower left jaw including canine) is this happened because of orthodontic treatment. and who should I contact to fix this.