Comcast - support and supervisor in billing. lied to me several times about getting my phone unlocked Citrus Heights CA

When I cancelled my service with Comcast (Xfinity mobile service). They said my phone was unlocked, so I sold my phone on Ebay and the buyer said that the phone was still locked. So I called Xfinity about this and they said if I make a payment that they would unlock my phone. But of course they lied again and told my that I need to payoff the phone completely. I told them that they should keep lying to me and now I'm out $150 for selling the phone at a lost. If they want to do business like that then I'm am sorry that I even had service with them in the first place. Unless I get my phone unlocked then I will need to let people be informed about the dishonestly this company portrays to the public.