South Africans frustrated by relentless spam calls now have a new homegrown tool designed to help block unwanted callers while giving users more control over their personal information, Cape {town} Etc reports. Built to help users fight unwanted marketing The new Android app, FokOffMense (FOM), was developed by South African IT specialist Mathew Riddle after growing tired of unsolicited marketing calls. According to an interview with EWN, the ap…