Cbse marksheet name correction

I am having a query regarding correction of me and my father name in CBSE Certificates of class 10 and 12. In CBSE certificates my name is RAVI S/o ANAND SINGH Where as my correct name is RAVI SHARMA S/o ANAND SHARMA. I had changed my school after 10. I did my 10th and 12th in year 2014 and 2016 respectively. I had contacted my 10th school when I was in that school for such rectification, for which they said it was a clerical error and they will get it rectified. But when I got my 10 marksheet, it was not rectified. Now since my 10th certificate has my unrectified name, my 12th school took it as it was in 10th certificates. NOW I am facing many probles and therefore wanted to get them rectified. I contacted CBSE and they told me that there is a rule to make correction till only one year after the result, otherwise you have to get COURT ORDER DIRECTING CBSE TO MAKE SUCH CORRECTION. Since now more than 1 year has elapsed from my 10th passing and which was base for my 12 certificates, I want to know what should be my course of action to have such rectification done. Thanks in advance.