Fraud in Data pack plan

My vodafone number 9648584615. I recharged with Rs. 354 ( Unlimited calling + 56GB data [ 1GB daily ] for 56 days ) on Mar 14, 2017. It should be expire on May 08, 2017 11:59:59. But it expired one day before on May 07, 2017 11:59:59 ( i.e. 55 days ). I complaint to customer care executive ( Manoj, Ashish, Imran from Lucknow ) many times. But, they all told me different reasons like one of them said your datapack is active ( not expired) and you will get data shortly. second of them said your datapack has been expired. when i calculated days to him, he cut the call. and last of them also said datapack has been expired and after calculating days he still said over.