Videocon DTH — DTH service

I have a twin cable connection from a single dish from Videocon DTH. The customer ID is[protected]. I took the connection in October 2014. It worked well only for two months. After that the image started freezing. The resolutions have been different:
1. the call centre operator would send a command to the set-top box, which would then reboot and the image would get restored (this solution would work for 2-3 days only)
2. the service engineer would come and reboot the set-top box, change the settings and make it ok - this again will would work for 2-3 days
3. the service engineer changed the connectors of the cable connecting to the set-top box. Worked for a few days
4. then, the service engineer came and said that the cable was faulty and he needed to change it from the roof (7 storey apartment). When pointed out that the cable was new and was put in by the Videocon engineer who installed the system, he said that no warranty would apply to the cable and it needs to be changed. This was done. Again, it worked only for a few days
5. the service engineer comes in again - now, he claims the set-top box is faulty - and surprise, even this is not covered in warranty now! Changes it - no use - the images continue to be freezing (see attached images). The man now claims that the splitter near the dish needs to be changed.
I am at my wits end. Am definitely going to change to a new service provider