Dstv Internet package

The wort experience, first time trying my own WIFI. I received a call from dstv to ask if I wanted to try their internet package, sometime last month. I have now used it for a little over a month and haven't had much connection or it says there is no network. I receive messages saying I've used the 25G but I haven't been home to actually use it. I then added an additional 6Gigs but I wasn't even able to connect to anything. I have canceled my line online but I try calling to find out what the process is when cancelling, but cant seem to get through to anyone over the phone. I am so disappointed as I wanted to get it uncapped so I can connect to a smart Tv. I have hardly used the internet but I've spent so much on this. I cannot be expected to pay for something that doesn't work nor does it meet my satisfaction. I'm highly disappointed that I'm not getting the help I need.