I'd recommend leaving the voice chat disabled. It's very rare, at least on PS4, to hear inappropriate language or bad behavior on the chat, but it does happen. Plus most youngsters don't seem to have any idea that they are constantly yelling into their mics and annoying all the other players.
By the way, your child should be able to access all forms of solo play against AI with no changes to the account. Only multiplayer modes with other human players are disabled for child accounts as far as I know. Like @dwooten77, I have my daughter's account set to let her play freely. She has no opportunity to play unsupervised.
You don't have to defend yourself, I was just explaining why it wasn't a problem for me. I'm very sorry you took my comment to be a judgement of your parenting.
Regarding your main point, this is a forum for players helping other players. All I can offer you, beyond what was posted by the EA employee above, is my sympathy. As I mentioned, every game mode in the game can be played against AI's at various difficulty levels, with no age restrictions. It seems that your three options are to do that, pursue @EA_Darko's suggested avenue, or seek a refund for the game. Cheers!
