Hyundai Motor India — installment deduction issue

Address:

20 Pusa Road opp metro pillar number 97, Karol Bagh n. Delhi 110005, 110043

Myself Rupesh Sarkar. Purchased Santro Cng Sports on 21/05/2019 from Autoweb Hyundai. Pusa Road New Delhi.
2 installment successfully debited on time post that installment deductions not happening on time.
Tried to get help from the showroom and from the bank. No response no solution.
It's hampering my creditscore.
No one there to take responsibility.