Cannot increase GMAT official score

Hi members,

I decided to create this post because I feel totally desperate and I do not know what other steps I should take.

I am battling with a GMAT for nearly 20 months, put in 2000 hrs + and I am still failing, even I am achieving above 700 scores every time I take mock ( I depleted all the official tests, so I am taking other tests MGMAT and Veritas)

Also when I do questions on my own and in a timed manner I am able to get around 80% weighted accuracy (around 90-95% on 600 questions, 85 - 78% on medium one and 70-80% on hard ones)

I was a member of all education provider you can imagine but still (even I feel confident before the exam and during the exam) I see no progress in the official test.

Virtually I cannot find and I feel pretty balanced in all areas but when it comes to the real test, it shows up a different story.

I took exam 4 times in a last 7 months and I achieved the following scores:

540
540
640 (q49 v28 ir7)

and today s one 570 ( I do not remember the score breakdown as I saw figures on the screen and canceled it out)

I am so down as I never been in my life as I never struggled with academics and as I put so much effort and so much time without any meaningful results.

Virtually I am willing to spent whatever amount to fix my issue but what s the worst, I cannot identify my weak spot and cause that I cannot even cross 650.

Psychologist, coaches, whoever ..... I want to hear from you! Did you ever meet with such an exemplar as me? What am I doing wrong?