Discriminatory treatment and pathetic service

I made deposits into my money market account with Momentum Investments over 6 months ago and Momentum has failed to process these deposits and credit me for the interest that's due to me. The Portfolio Head keeps providing reasons that make no sense and requirements that keep changing which I don't understand. I've asked for the matter to be escalated to the CEO and my requests are ignored. Despite following the request of the Portfolio Head with regard to supporting information that was requested my deposits are still not processed.