My Name Is Tauseef And I'm 36 Years Of Age

My name is Tauseef and I'm 36 years of age married and a father of 3 daughters. All are going fine but I'm having a bad habit of masturbation due to which my penis is almost dead. I'm heaving serious problem of bad sexual life and a very weak/short sexual time which just contain seconds only. Also my penis gridth is too small and erection is also week. Please help me and guide me what to do??