Kotak Mahindra Bank — Incorrect name entered and not corrected by Bank

My account was opened in Aug 2015 and even after submitting the I'd proof the bank entered incorrect name. Since then I've been following up with Bank to correct my name and they'll say that it'll take 15days/ 1week/ 7working days etc to correct this. But till now it's not updated and it's been 6yrs. This is really frustrating and it's like torture as my verification fails when I submit my id and bank account for some other process since the name doesn't match. Please check this I need my name to be corrected immediately do that the verification can be easy.