Bad after sales service

This business installs DSTV I did an upgrade adding two new explora decoders as extra view a month ago All seemed great, however, I started experiencing problems where the two extra viwe decoders were losing signal from the primary decoder. I contacted Multichoice to assist. They did all the checks and tests, resetting etc but found nothing wrong from their side. Multichoice advised it is a problem with the installation. I contacted Electroconnect who did the installation to come and sort out the issue. I spoke to a guy by the name of August who I presume is the Manager or Owner. He said he will get his technicians to contact me. It has been several days now of trying to get them out but to no avail. They are not answering their phones either. Please do not use this company as your installer