My personal opinion is that psychoanalytic therapy or even full psychoanalysis is the best what is available for deep wounds from emotional neglect. I think this is also considered regular talk therapy, although it is very different from CBT or any other skill-based therapy. So, my suggestion would be to look for a psychoanalyst.

ETA: not every psychoanalyst would be suitable though - I guess true Freudians (probably some still lurk around) and I think also Lacanians would not be of much help. You would want someone who is influenced by the British object-relations school of thought.