The company i work for says my paystubs are under investigation. Can i get in trouble for this?

i worked for this private owned company and at first i though this company was a scam. I applied to the position then they emailed me saying they need my cover letter, which i then provided then said they are waiting to interview me. So i waited and never got interviewed then they just offered me the position and said i was hired over the phone. On the phone they told me to clock in/out on this app provided on my first day of work and that my case manager would be in contact with me before my first day. No one ever contacted me. so i kept calling this company HR phone number until this day no one has answered me. I clocked in on my first day like told and started to go on the app and scheduled some caregivers like my job description says to do. i did this for weeks while still trying to contacting HR. Then they send me an email saying my paystubs are under investigation for fraud because im not working under a case manager even though they never gave me a point of contact and never answered my phone calls/emails or texts. Will i get sued or face jailtime for this? i have proof of me trying to contact them.