Hiii..

Hope you are doing good.

To be specific, yes, a name mistake is going to cost you a lot.

I dont know specifically the mistake you did, but let me just give an example for myself.

My father's middle name is " SANKARA" and I mistakenly wrote it "SANKAR" in the online application.

This has costed me a lot of time during the counselling procedure.

Dont do the same mistake.

Always check and recheck the name.

Dont even write the abbreviation of your or your parents' name.. always write the full name.

But as you had already done the mistake,

You will have to write an email to the concerning authorities. They may not respond to only one, so write 4-5 mails till they reply.

This is a serious issue, dont take this lightly.

Hope I helped.

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