When i was younger my father recklessly injected me in my buttocks i now have to dents that make me very insecure is there any way to remove this?

Yes: Yes, but you'll need to consult with a plastic surgeon

Help is out there: Dents in the fat can be helped with 21st century technology now. Plastic surgeons and dermatologists can help. There is technology to move small amounts of a person's fat from a location where there is too much, to use for filling in dents. The result is never perfect. I repeat, the result is not perfect. One can see his primary care doctor as a starting point.