Hdfcbank.com — Aggregator emi - offus

17787 debited as an aggregator emi - offus
how can they auto generate ?
not any intimation i was received.
How can they internally decide and apply
even suppose i was applied that such kind of thinks firstly you have to notify me what should be interest rate an what should be tenure i want to decide, how can u auto generate such things,
what kind of service is this?
credit card no. [protected]
hdfc bank vasai west