Terrible customer service. They clearly "screen" t...

Terrible customer service. They clearly "screen" their calls. No one answers. I mailed a check to pay for my alarm companies annual permit requirement on June 2, 2019. The bill was due June 21, 2019. A few weeks later, I received another bill from them, stating they still had not received payment. I began calling, leaving multiple voicemails to verify that they did not receive my check payment. No one ever answered nor returned my voicemails. On June 18, 2019, the automatic phone service was stating that the balance was still due, so I paid for the balance due and left a voicemail that since I had not received any communication back and had paid for the service via their automatic phone service, I was going to place a stop payment on the check I had mailed. The following day, I noticed that the had double charged my credit card for the payment and I called and left a message informing them. On June 21, 2019, I finally received a call from a rep that stated they had caught the second charge and were issuing a refund back to our credit card. A few weeks later, I received another bill from them stating that they had attempted to cash the check I mailed and had charged me a late payment fee and now a NSF charge. I still had not received the refund back on my card for the second double charge. My husband and I began calling again leaving voicemails for them to return our calls. When they finally call us back, we have waited on hold to speak to a manager/supervisor/someone in charge and they either are not working or will not come to the phone to speak to us. We were later informed that they send their refunds by check and when asked it should occur, they inform us that they do not know. When asked when we will hear from someone regarding the NSF charge we were informed that we would hear back in a few business days. Well, it has now been over a month. That is an unacceptable amount of business days. I did everything in my power to rectify this situation and this company has done nothing other than being intentionally difficult.