USAA Savings Bank Account Or Service Complaint

USAA Savings Bank account or service department,

Checking account Deposits and withdrawals Mississippi

I have an checking and savings account with USSA. My brother and I have a joint checking account, but separate car insurance policies. Ussa completed a ACH of $170.00 from my checking account to pay my brothers car insurance without my permission. I spoke with Ussa customer service on -/-/2017 and they would not give me specific information about whom authorized with ACH of $170.00 from my check account and where this $170.00 was applied to. I pay my car insurance of $58.00 each month from my checking account. I was on the phone with Ussa supervisor for more than an hour without getting detailed information about this transaction. I spoke with my brother and he stated that he did not authorize Ussa to completed any ACH transaction from my checking or savings account. Ussa stated that I could not sign a fraud letter due to my brother being on my checking account as the secondary on the account.