Default [Q] Messed up my phone

Hi, I have a Verizon Note 2

Anyway skipping ahead I've added a apk to the system app folder and now my phone is in a infinite reboot stage. I can only use it via Safe mode and so far android commander didn't help. I read up on adb but I keep getting Read-only file system when I try to delete the file. Is there anything else I can try? In safe mode I can install apps from the play store but am only limited to what came with the phone sadly...