If you feel that your marks are incorrect, then ask for remarking for the whole test or any sections no later than six weeks after the test date.
Candidates must pay INR 9,000 as an EOR fee for both Computer-delivered and Pen/Paper-based IELTS. However, if the IELTS results online change in the re-marking, the EOR fee will be refunded. Usually, it takes 4 to 6 weeks to process a request for re-marking.