Hi Muhammad. You can apply for mitigating circumstances if you experienced technical issues that affected your performance, however, this would usually be reported not long after the exam has taken place. You will need to show that you completed all of the mandatory system requests ahead of the exam.
You can find out what the process involves and how to submit a request on the website: click here to access. You will need to submit your request via your MyACCA account and this needs to be completed by 16 August. Hope this helps!