Sounds exactly like our experience. Aside from medication (combination of Zoloft, Ritalin, and Guanfacine) we ordered The Total Transformation program. It was invaluable in giving us concrete strategies in dealing with ODD/ADHA behavior. I would highly suggest the video on consequences which gives specific examples of dealing with lying. From time to time, they run sales so the price is pretty reasonable.
I know how helpless you feel but this helped us a lot. I wish you all the best.
https://www.empoweringparents.com/product/total-transformation-program/