Shakti, there can be various reasons behind why some other answer is marked in the SPR other than what you think you marked. One reason could be that you might have solved the question correctly but marked another option in the OMR sheet by mistake. Otherwise you might not have bubbled the OMR correctly and that's why some other option was read as the answer marked by you.

SOF does not allow rechecking of papers as the answers are not corrected manually but by the machine. So I am sorry but the result you received would most probably be final. Although if you still wish to contact them, you can email your query on their official email ID: info@sofworld.org or result@sofworld.org