HELP HELP HELP!!!

Hi all, I need a help from all of you. But first let me tell you my Three short stories.

1.) July : Got a mail from Amazon recruiter, was asked to share updated profile. I shared my CV. But got no response from recruiter. Followed up, but still no response. Story Ends
Reason I thought : In mail it was clearly mentioned that candidate should be from Product based company. As I was from service based they might have rejected the profile.
2.) August : Got a mail from Google recruiter. Scheduled for short screening interview. Passed the interview. Interviewer said that he will share the CV will the panel and if selected then will discuss further process. He seemed interested as I was able to give all the interview answers including some technical questions. But 2 days later got response that they will not be moving with my application.
Story Ends
Reason I thought : When I checked the job description, they were expecting the candidate should have 6+ years of experience, I have 4 Years of experience. That might be one of the reason.
3.) September : Today I again got a mail from a different Amazon recruiter. Asked to share my updated profile. I shared my CV. But within some minutes got response that they will not be moving with my profile. Story Ends
Reason I thought : Don't know. I have no Idea why they rejected my CV this time.

I thought that there might be problem with my CV. Therefore I changed my CV alot since July. But still no luck.

I am working in a service based company in India and continuously improving my DS and Algo part. I am still motivated for FAANG but dont know the reason for rejection of CV from the penal.

Can any one please tell me what should I do... May be in terms of CV, In terms of getting it noticed or anything. I know I have got a lot opportunity as I was contacted again and again. But what might be the reason behind CV rejection.?

**Please help. **