Wockhardt Hospitals — Billing dispute / admin irresponsible behaviour

Here I am suffering from extreme stress because one is mother Smt Bharti singh is in very serious stage admitted in ICU at Wockhardts hospital Nagpur and recovery is not expectations. and second is Here Admin department not behaving properly, I have given bill of rs 1884691 / -for procedure against estimate cost of Rs 1200600 /- . when I raised this concerned they corrected it after 3 days. during the period I fell lot of depression and stress. my concerned is how it happened. kindly address my issue and took corrective action.
IPID - 72274 Wockhardts hospital Nagpur .