Account closed and no response

My investment account was closed & shares donated without my express consent. When I complained they said the phone call recording was investigated and they concluded that I gave permission. I asked to hear that recording for myself and they simply did not respond. 6 days later I asked again, another 6 days later I urged their response. Nothing... Not only do I feel they acted without my permission on my account and my belongings (shares) but acted as judge and juror too on my complaint without allowing me access to this "proof"