If you retake igcse , can you still get into top unis?

This is kind of bothering me for a while, but can you still get into Oxbridge and top unis like UCL if you have to resit.There is sth that I didn’t make clear before, which is that I felt like I messed up during many of my IGCSEs.This may hinder my chances of getting into a good university so I am planning to resit.As the results are still not out , I can’t be sure of what I would have to retake.If I were retake the “bad” subjects is that the end game.