Lack of transparency causes unexpected costs

Upon enquiring about the cost of an ADSL line, Telkom advised R189 for monthly line rental (excluding the installation and internet provider fees) and we went ahead. Now the bill comes and line rental is just under R430 as apparently you have to pay for telephone rental AND ADSL rental - something that was never advised nor apparent on their website. It is unacceptable that a service is quoted at a cost less than half of the actual price and clients are just expected to pay. It's a sneaky was of doing business and grabbing clients by the short and curlies as it is now too late to cancel and let's face it, what other choice is there in SA for this kind of service?! As we are not using the line for telephone calls at all, we should by rights only be paying for the rental of the ADSL service line.