Bad after service Mr DSTV

These people came to my house yesterday to fix a " lost signal" on my secondary decoder, when they got here they went onto the roof and decided it was the " Optical hub" ( I'm reading their invoice) which they charged R2399 for. They also charged me R1300 for " signal repair and extra point"? And then R350 for call out, which in total was R4542.50 and I still don't have tv??? I had tv for all of 4 hours last night and then we went back to " no signal" I have phoned them numerous times today and messaged them and I keep getting told to do this or do that. I have even changed the decoder. I spoke to Dstv and asked them to get hold of them only to be told they'll give you a call. I think this is so outrageous that they are so quick to take your money but not quick to come back and see why the problem hasn't been rectified. I'm at my wit's end now and SO FED UP!!!!! I don't know how DSTV can accredit these people.