A.C.S Threat to send warrents for me and my sister who's disabled n have no checking account. calling my job, my family Internet

Did not write a check to them. It was an old loan I had and the banks closed my account when everything was paid off. Plus my bank wouldn't let them debit the account saying it was suspicious activity and locked them out and changed my accounts. Bad checks I understand that. But its a collection agency that's breaking the law.

It sounds like (I put  your post  through a english as a third language translator), and came up with the following.

ACS is  trying to collect a debt you owe because you wrote a check  to someone on a closed account?

Is this what they are trying to do?

If that is the case, there is no statute of limitations on bad checks. 
And yes, they could have you arrested for writing a bad check.

Is this why ACS is calling you?  Did you write a bad check?  Or did you write someone a check, then close the account before it cashed?

Inquiring minds would like to Know.  But Hey Jose Wales will defend your right to write bad checks, as he knows it is not your fault.  It is the wall street bankers who made you write that check?  Right Josie?