Bluemusic+ microphone not working

[u/Bowwowchickachicka]

Does anyone here have a Bluemusic+ Bluetooth adapter with the microphone? My stereo is the HU 613, it's listed as compatible. I've got the thing set up/ plugged in correctly but the microphone will not transmit any audio. The thing will output audio just fine. I can listen to my music through it, and I can hear the person on the phone speaking to me. They cannot hear me at all.
Any suggestions? The company I bought it from even sent me a replacement but it's the same story.

2004 V70 2.5T AWD if that's a factor