Air India — incomplete information provided by customer care

A ticket was kept on hold on 28.09.2017 around 2020hrs with pnrno. Hstlr [lucknow to jaipur 3.12.2017] for rs. 2507/-inr through customer care no. [protected]. It was on hold till 6.10.2017[2020hrs]. Today around 1500hs i went air india jaipur office to confirm the time ticket and payment. I was informed by the counter [nehru place, jaipur ] that now ticket cost is rs. 3500/-. Though i was informed by the customer care that till 6.10.2017 the fare will remain same inclusive of taxes. Due to incomplete information by customer care, i have suffered a loss of rs. 1000/- please help me and consider my case. I want to travel as per plan of pnr no. Hstlr if the fare of rs. 2507/- is provided to me as one time relaxation due to the fault of air india. My contact no. [protected] email [protected]@yahoo.co.in