DSTV EXPLORA - ENDLESS PROBLEMS

In January 2016, my husband (ID available o request) took up the offer to upgrade to a DSTV Explora at a fixed monthly price for 2 years including installation, dish, etc. We have had endless trouble and are presently on our 3rd Explora and we still have big problems. We pay for the premium package but cannot get half of the stations including 102 and 103, Cannot record anything as Explora can't find the programmes, Box Office if virtually non-existent, Explora boots and switches off several times a day, Catch Up is very slow catching up. We have had the installation checked and the signal and quality are perfect so the problem seems to be with the Explora as we understand that many other people who have the same problem - our installer is working with two other customers who have identical problems. Clearly you have a batch of faulty Exploras. This costs nearly R900 per month and as pensioners this is our only form of entertainment and we are extremely unhappy. We have phoned Customer Care many times and followed all their advice but nothing seems to help - what do we do. Put back our old PVR which never had a problem.