Results using fitafinity fat burners

Hi so I am from the UK and recently bought some fitafinty fat burners that I believe came from USA. Anyway in the past year and half and after having my daughter 6months ago I have put atleast 4stone on. I was 10st7lb dropped to 8st following slimming World but have rocketed back up in size plus more. Has anybody used these fat burners and had good results? I am also following and making changes in my diet aswell. My downfall is fizzy coke and cake/chocolate lol. I have switched to coke zero. More water which I was barely drinking any and have started eating salad and fruit etc. Im hoping it works again as I feel so self conscious in my self. Espesh in these heat waves lol