Getting the right internet bundle can be confusing. Personally speaking, I always get a touch of 'information overload' when cruising these 'bundled offers', especially if I haven't looked in a while. With so many "bonuses" flying around, it all starts to feel a bit too much like Las Vegas to me.
It's up to each individual to consider their personal circumstances when choosing a plan bundle offer, so please consider the following as general advice only. However, hopefully I can offer a few pointers that can help reduce the gamble, assuming you are not locked in to a contract.
Firstly, I'd encourage you to take a brief look at the following two articles from CHOICE, our ISP satisfaction survey (about 18 months old at the time of writing this post) and this article on Telstra plans compared. While some of the plans have changed, it should still help to give you an idea of the type of deals (and savings) available on the market. You can also compare broadband bundles live on Whistleout (be aware of sponsored posts and the like though).
From visiting those sites, hopefully you have noticed a few high or unlimited data internet plans from reputable providers that could potentially save you some dollars. Then, even if you purchase the Foxtel basic package on its own, you should still end up with a cheaper overall deal. Since the Foxtel satellite dish issue also has you a bit miffed, I'd encourage you to check out this list of streaming services compared. Many of these streaming services only require downloading an app. Just a note, you could also download the Foxtel Go app and use this on your Smart TV, or via a laptop or gaming console and refuse the satellite dish as a possible solution.
Regarding your T-Box, it looks like support is still going to some degree, but eventually they will stop working altogether. Just like with cars, the T-Box has been replaced with a newer model. Hope this helps unmuddy the waters a little, let us know how you get along with it all.