Payment issues

I moved ro Richards bay two years ago and joined National security and fire. From the start it was very disorganized. I moved into a new house a year after i joined national and wanted to stay loyal to National and kept my business with them at the new house. I got National to upgrade the security system in the new place and the tech team was realy not bad. So obviously i have a monthly bill and now need to pay them for the extra work i got them to do. After a month in the new place i noticed that the monthly bill nor the upgrade bill has gone of my account as per the contract agreement. I have reported this issue to National numerous times via calls and mails. Their acounts department is fully aware of this and gave me a call and never came back to me regarding this matter after i explained to them what the issue is. I again gave them all required details including my bank details. Im probably the most honest customer they have or just stupid to keep up with this. Like you can imagine now im sitting with a hefty bill and no help from National security and fires management to come to a conclusion how are we going to sort this out. This issue is now becomming very long winded and has taken up lots of my time to try and sort it out with no positive results. It feeld like im doing Nationals admin for them.