https://www.desidime.com/discussions/zest-money-emi-repay-delayed?page=1#post_8751735
You should always have automatic payments enabled by ecs/nach for repayments.
In your case, you will be charged late fees + Ecs bounce charges(if ecs enabled) + Intrest charges for late days + Gst 18%.
Sincd it was just a day late I don't think the late payment will be reported to cibil