You will not be allowed to take the ACCA exam anymore. It is highly unlikely that ACCA would allow you to re-register. The deadline is 10 years ! This is a pretty long time and most of the people who can’t clear an exam within this time frame usually give up on ACCA and pursue other career interests or continue with their working lives. So aim to finish in good time!
Saying that only way to find out is to phone ACCA. Rules are there, but they arent monsters. If you had to take a paper 1 or 2 sittings outside the 10 years, they may allow this.