You can earn your guinea pigs trust by giving him food in your hand play with your guinea 3 hours a day passing your hand over his/her head a lot. And every single morning put your guinea pig in a basket in top of your eating table and give them food there so that every single morning for a month and like that you can earn his/her trust . When I got my guinea he diseño like me but when a started doing that in a few week he/her loves me.