Lack of job knowledge of a consultant

I took in my 2 dstv exploras for testing as the primary didn't respond to the remote unless I reboot and only then it responded for a few seconds. Also both the primary and secondary decoders kept rebooting randomly. I found a lady at Randburg customer service centre called Pleasure. She tested the signal port and said it was at a 100percent for both decoders. She said it must be signal on the connection. She said I must call in the installers. Upon my communication with the installers they said it's not possible for signal to cause decoder to reboot. He had said that even before I had taken it for testing and was surprised to hear there was no problem with the decoder as according to him and the multichoice agents I had called, the signal was ok. The installer came through on Monday ( 21.03) to check out the installation and still insisted we go together to multichoice. We assisted by aguy called Vuyo and immediately said the hard drive needs formatting which he did and found it was ******* and then replaced the decoders . I am so disappointed that I had to use my petrol to come from Germiston to Randburg the second time and also had to pay a call out fee because someone didn't kn