CBE group Inc review: Stay away

CBE group is trying to collect a Alltel cell phone bill that I DO NOT OWE. I had settled this last year. My dispute was being billed for something I did not owe. This was even stated by Alltel/Verizon in writing that They had cleared this debt out. I had another agency after that calling about the same thing. Again, I advised the debt had been cleared out. NOW I HAVE THESE Pains calling me and should not. I refuse to talk to them, I am tired of this. I DO NOT OWE THIS BILL!