Bullied at work, resigned, told to leave a week later

I am so angry. I have records of what people said about me at work and said about my performance and disability. I have been ostracised for the past year. I was told to leave work and will get paid for the notice period I otherwise would have worked. Does this count as 'constructive dismissal' or a breach of employment contract as the bullying was not dealt with by those in upper management who were aware and allowed it to continue?  What can I do?