Installer problem

For the past 3 weeks i have experienced problems with both extra view decoders having to be rebooted everytime someone wishes to view. The system installed by DSTVs selected installer who has no interest in fixing his bad installation is simply not working properly.Despite numerous mails to and from help@dstv simply do not yield results.The reference number given is ***5. I would really like to speak to someone who is prepared to use some authority to have the installer taken to task. Regards Conrad Zietsman