If my employer sent me home in the morning after raising concerns and then removed me from all company communications, does that indicate that they terminated my employment? Because now I am hearing from clients that they were told through an email that I quit. I did not quit, but how do I dispute this?

Does this become a he said, she said thing or is this a constructive dismissal? Would I I be entitled to EI or severance?

You should follow-up in an email and ask opposing counsel to confirm the status of your employment. Either way, you should consult our firm at the number below, as you are likely entitled to a severance package even if your employer tries to falsely allege that you "quit". You should request a copy of your ROE and apply for EI. Technically if an employee "resigns", they are not entitled to collect EI, but Service Canada will evaluate everything on a case by case basis. If you did not in fact resign, you may still qualify for EI.