UCAS amendment on AS level

Hi. I have a question about the amendment of my AS levels on UCAS. I am an international student and don't have any person who is familiar with A-level system around me, so If I seem to misunderstand something, I beg you to point our to me so.
I took some AS level exams in October, there I did a bunch of misunderstanding and mistakes. I fully know I will get the horrible grade, which will be available in mid January.
I have already invited to an interview by Cambridge, but I am really concerned the fact that I failed AS level terribly will affect seriouly on my application, which result will be announced in the end of January.
I already decided to retake the same exams in January so I tried to delete the October ones on UCAS, but I found they won't if I am on a status waiting for the result.
Do you think the AS level result could be concern on my Cambridge application? Is there any way I can do to treat with my AS level result?

"I already decided to retake the same exams in January so I tried to delete the October ones on UCAS, but I found they won't if I am on a status waiting for the result." - this is a strict no no. You must declare all of your results for all of your public examinations, whether you failed, are resitting, are unhappy with the result, or think they have no relevance to your degree. You do not have a choice in this and if you don't do it, your application can be cancelled, even after offers come in.
If you do get an offer from Cambridge, it may or may not include a condition on your AS results. It is likely that it wouldn't - in which case doing badly is not actually the end of the world, though it may do depending on your curriculum.
If there are any qualifications that you have not mentioned as part of your application, this needs to be remedied immediately. This is something UCAS and universities take very seriously.