I’m an international student from the arivbean studying the British system.
They sent terrible grades that were WRONG ( I have a certificate to prove it )for 2 courses and they didn’t send my grade 9 grades and they didn’t explain the grades very well. I already obtained my high school dimpling which they also did not send.
I have unofficial CORRECT copies of my proper transcript but I doubt admissions will accept them 
what should I do?
No school will look at unofficial transcripts. You need to have the corrected official transcripts sent directly from your school.
Contact your secondary school or give it up.
“Or give up”??? On what exactly?? I hope you don’t mean applying to colleges.
How did you get CORRECT copies of your transcripts if your school does not have them?
The corrected copies need to come from the school with a cover letter from the HS counselor explaining the update.
You really wouldn’t understand how the public education system works where I’m from. I no longer attend that high school ( all students HAVE to leave after grade 10 ) before we leave, we need to apply for scholarships to do the A levels which require our unofficial transcripts which were emailed to me by the head of IT sent to me. These transcripts are CORRECT.
Regardless US colleges will not accept unofficial transcripts. They will not take your word for them being CORRECT.
Send your unofficial copy to your former high school and ask them for help in correcting your record. For admissions purposes, the sealed official transcript must come directly from the issuing institution.
they acknowledged their mistakes and resent improved transcripts!