Rectification of relieving letter

My relieving letter provided to me upon my resignation from the company. My last working day was August 1, 2019, but the relieving letter states it as August 28, 2019. I had paid my full recovery amount for For full and Final settlement of Rs 9945/- ( Nine thousand Nine Hundred Fourty Five Only ) than how come my date of relieving is August 28, 2019. As per system I had resigned on July 30th, 2019 and asked for relieving on August 1, 2019 and then company asked for recovery amount for short notice period for full and final settlement, which I had paid later. My relieving letter and fnf statement clearly indicates that all my remunerations are calculated for 1 day of August only. All my monthly allowances are taken back from me as recovery. I was not paid till 28,th August also. It is till 1st August only as indicated in fnf statement then how come my lwd is 28th August? Post 1st August I joined a new organisation. This discrepancy is really impacting my career progression. I had mailed many times to company hr and md & Ceo but still didn't get any solution