Year 13 Resit

I done bad in my A-Levels I got CCE. Bio,geo and chem respectively. This year was hard for me and I also left all my revision too late. I have been a B student but as you can see by my A2 results I didn’t get that. Does anyone know how I could resit my exams but for the summer exams not the autumn ones. I’ve seen that private schools offer resits but there are a lot of expensive ones does anyone I’ve heard that colleges offer resits freely but idk where to start I’ve also heard you could get tuition and retake them. Can I have some help

You can enroll at a college to take A Levels a second time, or you can pay a small fee as a private candidate (which means you wouldn't have to attend college through the year, just study on your own and show up for the exam at the end).

More on this here:
https://www.thestudentroom.co.uk/showthread.php?t=7072676