DSTV has worst customer service department ever

Called dstv 8 times each time getting different advice and none of which were correct. All i want is to change my package type and remove one extra view decoder. I made the payment due and now after five days it is still not working and their number does not work anymore? How can you sell a product like this with no contact centre number working?? The people are not trained well and do not know how to do anything except remove onscreen errors which can be done by a robot