Botox and neck spasms - what is wrong with me?

Hello, I had lower face Botox 6 months ago. A week later I felt like my throat was spasming and going to close and I was having difficulty swallowing. Six months later I’m still having spasms but now you can see them on the left side of my submental area and neck. It does this all day long. I am miserable. I’ve been told that it would go away but it’s been 6 months. What is wrong with me?