Bad service

I was having signal issues, so I called an installer. They came and the issues persisted. I was advised to purchase a new decoder. I purchased a new decoder and when I tried to add the new decoder to my account I was told by the multichoice agent that there was a ***** investigation on my account ( I pay cash). She said she is not sure what is being investigated but she will request her manager to contact me. A week later after no one got back to me I enquired again and I was then given an email address to send my complaint to because apparently, the agents didn't know what was being investigated on my account. I sent an email to billing*****@multichoice.co.za on 25/03 no response as yet. I paid for my subscription, I bought a new decoder, paid for an installer but I still cannot watch DSTV .