Scammers through CashApp

On 11/09/2020 I reported to CashApp that a person claiming to be a representative for them contacted me saying that my account was locked and a demo transaction had to be done in order to unlock my account. I was scammed out of $345 via Bitcoin and they said that they can’t do anything about it. What can I do? That was all I had left to my name. I know that company’s don’t care about us common folks but to allow a person to scammed is heartbreaking and disappointing