Uber India — charging more even after applying "flat" charge ride pass

I have purchased a Ride Pass from Uber India. The pass is for "Flat" Rs. 89 for 15 of their Go rides for 28 days. On multiple occasions, I was charged Rs. 200+ even after applying the Ride Pass.
The first time they reverted the additional amount that was charged. But this is happening again and again. Even after complaining, they haven't resolved the issue.
The SMS from Uber clearly states:
"Buy a Ride Package and pay one fare everyday!Enjoy flat fares of Rs. 89 on GO and Rs. 99 on PREMIER for 28 days".
The meaning of flat rates means there should be no other charges (apart from any tolls)