After I have signed a contract with a company as a Sales Rep, I only worked for them for 2 days. On the 3rd day, I have sent an email, text message and spoke to their HR that I will not continue my employment anymore.I was expecting atleast some training on my first day, but left me all alone to work and I followed up with my commission and did not receive any replies from them. After a week, I have received a letter of Breach of Contract via post mail. Stating that I did not follow the 30 day notice of resignation and have caused them damages already, which I don't know what damages are they talking about. Demanding me to pay 100K in 15 days.What should I do about this? Thank you.