Faulty installation

I have been with multichoice for years now and recently I moved to a new location and purchased an explorer, I have been here 5 years and already have had to call in installers 3 times this would be the 4th time I have to call someone, it appeara I have to call out an installer every year to come assist me as the problem I have always happens every years and also follows the same pattern, every year my secondary decoder in the bedroom starts losing signal, it starts off by being channel selective, some channels do not want to tune in, then eventually it moved down to the primary decoder becoming super distorted and requires rebooting now and then, I have had 3 of you accredited installers come out and quiye honesty it’s becoming a rather worthless excercise, do I realy have to pay installation fees every year??? I mean subscription fees are already expensive enough as is and to pay yearly installation fees?? My wall where the dish is has holes in it as every time they move the dish to a different spot, in a few years time I’m not hoing to have a wall left if this persists, as mentioned I’ve already tried 3 different installers yet the problem comes back every year, can Multichoice hmeet me half way im finding a solution to this problem, as now this is starting to be a rather pointless excercise, people have had their installations for years with no problem, yet with me I have to install my dstv every year, 3 different installers have been able to sort the problem out for me, can you atleast help me come up with a solution instead of referring me to different installers every year?? May I request that you send out your own technicians (free of charge) this time, instead of referring me to different installers every year, I have been loyal to Multichoice/DSTV but this excercise has left me powerless and frustrated,if possible can you escalte this request to the highest point, I still have the holes on my walls to show how many times this has had to be done, I would humbly request your assistance because clearly there is a problem here which needs to be resolved, permanently