Poor Service and Communication

I made a payment on 28 November and sent the POP as usual, then received a confirmation email with ticket #344864 stating that my ticket would be handled by a Service Agent. Yesterday I got an email saying my Internet service had been suspended, so I logged ticket #347826 to let them know the payment was made on time. In that email I mentioned the name of the Service Agent who had originally handled my case; they then reassigned the incident back to that agent. I have sent several more emails (including one this morning) and called multiple times. The first call couldn’t connect, the second put me on hold until the voicemail cut in, and even after ten attempts I’m still waiting—sometimes holding for more than 15 minutes before it disconnects. No one has taken accountability or offered a callback confirming receipt of my ticket.