Terrible/********** subscription

Hi I'm experiencing terrible service with your service providers. I bought and installed a decoder and within a 2 weeks after installation, they came to collect it saying it belongs to another customer however I am still liable for the monthly subscription which I have paid. They have not given me my decoder but I am still continuing paying dstv the monthly subscription. Kindly contact me on ***. They are giving me a runaround as they keep promising to fix the problem.