Whirlpool Fridge — not attending

Address:

Mumbai City, Maharashtra

there is black mailing thru bajaj fin even i had paid the full payment .now they asking me foe extra payment. so pls help me as my name is farida shaikh .loan a/c number is:4050CD00253552,insurance extra payment as my installment was 3500/- and they were asking for insurance 450/-extra.
for which i have came in civil as i had paid the full payment.
help me in this case.
farida shaikh.