I have the same issue.. Simple pay claims to have lifted block they had on my phone and transferred me to Simple Mobile.. I have been with them for 2 hours and they still can't help me.. I have phone service but without internet services.
I escalated case to Supervisor from Simple Mobile, and im still on hold.
It is an endless loop when you slip on a payment. I went almost 3weeks without services because smartpay nor total wireless could fix the issue. They continued to tell me they had escalated my case but each time they would re-escalate and then say wait 48hrs. I finally had to break down and contact someone higher up and it was resolved in an email because everyone was skipping over the problem.