If what you have said is true, then it indeed is shocking. Since they don't face any competition in Hyderabad & interior Sindh (being sole IMC dealer), they do what ever they like. On the part of being heavy on pocket, let's agree that all authorized dealerships are ripping customers of their hard earned money, Toyota Hyderabad is no exception.
Just to give you an example that they quoted me 10 thousand rupees for the front chrome strips like that in Grande, where as the same thing with little bit quality compromise could be done from outside market in merely 2.5-3 thousand rupees. A price difference of more than 300%
Nevertheless, PBO clearly says if the customer isn't given delivery in the month mentioned on PBO, then he becomes entitled to get 100% refund without any deductions. If this is so, I would better claim refund and get the car booked from Karachi, but still it would be premature to draw any plausible conclusion at this point in time.