POOR Service

I received calls from them at 7am, when i answer, they kill the call. When I answer, they take forever to answer the call and then the agent is (usually) rude and/or poorly trained. They called me 6 times in 2 days, AFTER I paid the account! When I asked if they'd received my payment, they state they haven't - yet the BANK sent an sms to verify. When i called the office number, they don't answer. When I emailed the proof of payment, i don't get a response mail. When whatsapped the PoP, NO response. When i emailed the 'head attorney', no response. How is this a 'Legal firm', when no one responds??? When I asked how much each call costs me, they kill the call.