Other Fuel System Tank Filling/charging problems of the 2014 Nissan Sentra

2014 Nissan Sentra sl 4 door sedan - faulty fuel gauge indicator. The fuel gauge indicator is showing less fuel that is actually in the tank I. E. There is more fuel in the tank than what the gauge indicator showing - and it getting worse. I contacted Nissan consumer affairs that recommends taking it back to the dealer for repairs. I took it in several times and still it happening I. E. The problem still exist/not corrected. Dealer replace fuel pump but problem still exist/not corrected - and dealers giving various excuses. It is very agonizing emotionally, mentally, sleepless nights, etc. Etc. Thinking that the vehicle will run out of gas and left one stranded. Cannot tell now if the digital or manual gauge reading is correct because both are different. Ps. This gradually started in November 2014. I kept monitoring it and it getting worse, then I decided to call Nissan consumer affairs and took it back for repairs on August 31, 2015 - then again, September 3, 2015 - the again November 6, 2015 . This is the reason for me to state "the happen date" as August 31, 2015. This is a serious problem that causes over filling and spilling of gas that can cause a fire. I believe there is a malfunction of the Nissan fuel pump and the fuel gauge indicator. I would recommend that the NHTSA speedily investigate this safety matter. After November 6, 2015 - I called and left messages for the Nissan representative that handles my case, but she never contacted me back.