Lots more information needed here. As Debra asked, how old? How long have you had this dog? Is this a new behaviour and if so how recently has it appeared? What training have you done with this dog? IMO, it isn't unusual for a Basenji to object to doing something it doesn't want to do (or when asked to cease doing something it does want to do!), but usually this will be only a grumble and if it has escalated to biting or threatening to bite you need to deal with it, and if you aren't confident then you need help from a qualified trainer.