File a formal complaint against Apple and its representatives

How do I file a formal complaint about horrible customer service from Apple while trying to help reset the Apple ID password for my daughters device? She requires it to help monitor her health issues. Today I had a senior customer service tech tell me that I Apple refuses to do anything to help fix this issue that keeps looping her account. He talked nasty to me and was very abrasive in how he spoke to me. He did not try to resolve the issue. He just kept telling me I had to keep doing exactly what I was doing over and over again. He would not hear me say what I had already done. He told me he did not have a time machine to go back in time to monitor the steps I took. He was very rude and had no understanding of how a real customer support person should treat people. I did file a BBB complaint because their actions are stealing money forcing me to have pay again for apps I already own under her account.