H1B Visa Cancellation Process

Hi Saurabh,

I had conflicts with my US employer and i am scared that he will cancel my H1B visa.

Can you please help me on below mentioned questions.

1)How many days approximately the process takes to cancel the H1 visa?

2)If my Visa is cancelled by my employer , will i get any notification from USCIS?

3)If my Visa is cancelled by my employer , will i get any chance to file new petition with another employer?

is it considered as Cap-Exempt?