Shelley I would try and sign onto the nbn service if you can. It will work out cheaper in the long run and your phone calls are free using voip service that they provide. Also they can offer fast downloads and or speeds. Some isp's are offering up to 100 Mbps service. Also although the nbn uses the same old copper cable to the premises it should be within 400 metre to the Node where it connects to the fibre cabling. This should provide some help with copper cable connection problems.
Hope this helps