There is nothing you can do to cure anxiety.
Personally and professionally, this myth is very frustrating to me. It is a closed-door mindset that is utterly false. “But I’ve tried really hard and nothing works.” I hear your pain and frustration, but let me ask are you trying the same things over and over expecting a different outcome, or are you trying something different that has worked for other people?
Our experience of anxiety is strongly based upon beliefs, experiential learning, and neurological/biological reactions. When we correct beliefs and reinforce with new experiential learning, then our reactions can change and the experience of anxiety can fade or even disappear.
Seek out a therapist in your area who can help you develop a treatment and recovery plan that can help you take your next step on a new path!