How do you get rid of insertional Achilles tendon pain that you battle for over a year?

Achilles tendonitis. You need to be evaluated by a podiatrist or orthopedist. X-rays should be taken to evaluate the area. Often times a simple 1/8 to 1/4 inch heel lift will help, but remember if you lift one side you should lift both unless you have a diagnosed limb length discrepancy. Physical therapy can often times be beneficial with achilles tendonitis.
Have yo tried. A heel lift to take the pressure off of it. Also physical therapy would help. Also, i suggest NSAID medication.