Hi. Try the tutorial in each link below or resubmit including the alphanumeric code of you Fondi device. Also disclose whether it is a tablet or a smartphone. If it is a tablet, tell whether it takes a SIM card or not.
http://www.satechhelp.co.za/2574/Factory-Reset-Fondi-G312-Android-Smartphone
http://www.satechhelp.co.za/3009/Hard-Reset-Fondi-T725b
http://www.satechhelp.co.za/2574/Factory-Reset-Fondi-G312-Android-Smartphone
http://www.satechhelp.co.za/3009/Hard-Reset-Fondi-T725b