Does one need to get a lawyer or can they do arbitration against a financial planner by themselves?

When my financial planner decided to "just buy and sell my stocks" without a written permission or by calling me, I immediately called him and put an end to this.
Now I have my account on hold and need to get it out of his hands, but I have been very sick awaiting surgery, so it has been a mess.
He and the head of the firm didn't answer a letter my attorney wrote them, so now that my account is stil in their firm, for six extra months, can I still go about suing him for the unethical selling and buying of stocks, plus puttting me in high risk, when I am conservative.
Please help me, and thanks, Patti - Is this your question? Add additional information