Good analogy, but...
Telkom should only charge for the "extra water & beans" and not double up on charges - there's a lot of double in POTS+ADSL rental.
But how do you justify this argument in principle?
There are two separate issues here as far as I can see, and neither of them is the one that matters.
The original issue I was responding to is the price differential. But it's clear that this is normal business practice. Companies will always try to get customers to pay exactly as much as they are willing to for any product. Coffee, seats on an aeroplane, or ADSL. If you have a problem with this, you must have a problem with practically every company on earth.
You have also introduced what looks like a moral or legal question -- whether Telkom should be allowed to "double bill" us.
This isn't really the issue either. It just so happens that we say rental costs R152 and the line R133. Insofar as we know these are the inseparable costs of ADSL, who cares how they are divided? We ultimately only care about the total cost: R285. As customers as opposed to shareholders, it's really none of our concern how this revenue is distributed between the operational expenses. They may have made a bad business decision to call these charges what they did, but where's the harm? I think you'd have to show that customers were not getting something they were told they would.
But the real problem is exactly the opposite! We're getting something we don't want: analogue phone service. So what should concern us is the
waste. If you got your line only for ADSL, and don't even have a phone, then Telkom's billing, support, retail infrastructure and maintenance of the POTS network are all going to waste on you.
This is as much Telkom's problem as ours, which is why I'm confident it will be fixed in time.
This doesn't mean we should get R133 off the price of ADSL. That's probably untenable. But we
should expect Telkom to allow us to cancel our POTS service and save, say, R50. This benefits everyone, not just the guys ordering the grande latte.