Technician incompetence leads to extra billing?!?

Our ADSL line is almost always unstable due to Telkom's inability to provide a good quality line in the center of a metropolis. Every now and then the line just cuts out completely due to attenuation on the line.<br> We called out a technician to come out and try and fix whatever is happening. <br> <br> Not surprisingly, an *********** technician arrived and tried blaming the poor line quality on everything from Mweb(as an ISP?) to software on my computer. It doesn't take a genius to know that SNR and Attenuation is NOT affected by an ISP or PC software. The technician went on to install a new filter, although I had 4 perfectly working filters. This did not fix the problem. He was shown the connection hub at our complex where the previous telkom technician made a very questionable wire connection which has rusted completely. He proceeded to fix the previous technician's mistake at our complex's exchange, which is Telkom's responsibility. THIS is what fixed the problem. Why do I get billed for \Unnecessary call-out"?? <br> Oh"