PATHETIC SERVICE FROM DSTV

I needed to install a decoder in my room as I already have an explorer in my lounge. I bought he decoder and phoned DSTV call centre to ask them for a number for an approved installer. they gave me the details of AERO SATS INSTALLATION. They quoted my R600 but when they came out there total charge was R1695 which I queried with DSTV and they confirmed I was overcharged. I laid a complaint for a refund and spoke to PENELOPE NEMBULUNGE FROM DSTV who has not gotten back to me in a week. PLEASE HELP!!!!!!!