Protonmail They shut down my email account for no reason and deleted over one year of my saved emails for my business Internet

Over one year ago, I began using Protonmail for my consulting business email account.  During this time, I accumulated over 100 emails related to my business and stored them within their system.  All of a sudden, without warning, Protonmail shut off my account and accused me of spamming.  This took me completely by surprise as I do not even know how to spam anyone.  They claimed to have spam emails sent from my account but would not provide me with any evidence. 

They refused me access only to get my stored emails and they keep sending me insulting emails trumpeting their superior system and refusing to admit they made a mistake.  I am a victim of their ridiculous insinuations that are absolutely not true.  Their company is reprehensible and they hide behind the fact they are located out of the country.  They apparently do not answer to any regulatory authority in this country.  BEWARE AND DO NOT EVER OPEN AN EMAIL ACCOUNT WITH THESE CROOKED PEOPLE.