Bad service from DSTC

This is the second time I have to write to you about DSTV. They came and connected the two decoders but didn't connect the correctly. When there is loadshedding my inverter goes on and so does the tv with an error message. Waiting for connection. I have sent them messages and they have done nothing. I have just taken the decoder to a Dstv shop and they said the two decoders are definitely not connected properly.and that someone from Dstv needs to come out again. They don't come and we don't have tv. To add insult to injury I am supposed to be on price lock and they say I have to pay R919 next month. Please Hello Peter I really need help.