[Resolved]  Godrej Properties — missguided payment schedule - tentative schedule for 3rd instal is nov 18. but invoice given for aug 18

Address: 560061

I have a flat booked in godrej - eternity, bangalore. At the time of booking, tentative schedule is provided in which 3rd installment is to be paid in nov 18. But without giving any prior information, invoice is sent 3 months in advance for payment in aug 18. It is understandable of schedule a couple of days +/- but not 3 months, that too without any prior information. I plan my installment payments based on the tentative schedule. But this surprise has put me in hardship. I will be able to pay only as per schedule (+/- a few days). As i need to arrange funds. I am worried whether this happens for further installments also.
Please provide updated schedule immediately.
I get a casual reply from your concerned authorities at bangalore for my concern without providing convincing reply.