"I recently was terminated for no reason because I requested to speak to the corporate office because the branch manager wasnt helping me with issues I was having at the office."
What issues specifically?
"I have complained about harassment for years and nothing was done about it."
What kind of harassment? Unless it was sexual or based on a Title VII reason then there is nothing illegal about it. Most harassment is legal.
"When I asked the branch manager if I could speak to the corporate office about these issues, he terminated my contract saying it was employment at will."
Was it an actual contract or an employment letter that specified your hiring terms? If it was an actual contract you might have a breach of contract case.
"This branch manager has cost me thousands of dollars in renewals for simply not doing his responsibilities."
Nothing illegal about that. Bad management: sure.
"I tried to call an attorney and can't find anyone to help me with this."
Then they haven't broken any laws. If no attorney will take the case then none exists. Sorry.
"That's just my opinion, then again I might be wrong." Dennis Miller