Guardio review: Has a 3 day money back guarantee

I tried to sign up for a company to protect my computer and cell phone. I paid $319.87. I went through all the info I could, attempting to get the service to work. Until I reached a page i had no idea what it meant. I hadn't received a "welcome" email or a receipt. I Googled Guardio for a contact by email. I was offered several options but I am done with them-I don't trust them. So I attempted to disconnect. My money was deposited in my Paypal account on August 10, 2026. I contacted them today, August 14, 2026. 4 days of trying-then she dropped the bomb-they have a 3 day money back guarantee-sorry we cannot help you. We will disconnect and not bill you after August 2027. I lost $319.87. I'm 72 years old on SS. What am I suppose to do?