Billdesk — Bajaj finance says it's for 12 months

The emi was for 10months as i have already paid 10000 in the first month.
The bajaj finance people say that it's for 12 months.
You don't give any number to talk to.
The interest you put in getting people buy your products should have actually been invested in solving their issues.
This is the worst worst service i have been provided.
I want this for 10months or i can file against you.