Sorry for your inconvenience :(
1) Please click '? Support' in the bottom left section of the Fyber offer wall.
2) Pick the offers that didn't work correctly.
3) Send your contact info to them and follow the further directions.
Fyber will solve the issue for you directly. Fyber is the 3rd party partner of Fronto so Fronto doesn't have any control of its customer support system. Hope your problem can be solved quickly! If they don't respond, please let me know.