Can't hear calls/hangs up automatically. Help!

I have a galaxy s6 edge+ with a newly installed ROM (SmokkieROMv4) which I absolutely love because it's so snappy and battery life is awesome! It's like a brand new phone. Props to the makers!
Specs:
Android 7.0
Kernel: 3.10.61 SmokkieKERNEL_v2
Build number: SMOKKIEROM V4
Phone Model: SM-G955F (Galaxy s6 Edge+

Here is my problem, everything works great besides being able to talk to people!!! If I call my voicemail it automatically hangs up after exactly 6 seconds, if I call any other numbers it has no dial tone or any noise whatsoever but I think it does connect...just no sound.
Things I've tried:
1. Factory reset

2. Clearing all app data/cache/dalvik

3. Installed various phone/contacts .apk's and set them to my default calling app, and disabled the ones it came with. I did set all the permissions for the newly installed .apks with the same results when I call someone.

4. Disabled S voice and google assistant (Unable to toggle "Ok Google detection" in the google app because it's grayed out(disabled) for some reason.

5. Tried a different ROM with 7.0

Please if anyone knows how to fix this it would be very much appreciated as I do love this new update very much and everything else works flawlessly!

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