How long did you wait for the respone? They have a full support queue still waiting. Even if you get rejected you should get a response.
This sounds more like a problem for the carrier rather than framework. You should ask them again and tell them that your package didn't get delivered. You should wait for their response (about 2 weeks should be appropriate).
By then you should have a response of framework and can decide your next steps. If FedEx declines you can threaten them with legal steps. You should keep that as the last step though.