I have no problem getting on the phone with an ISP for a client. Did one on Friday with a signup to TPG, home phone, internet and mobile phone. I charge my usual rate per hour and people are happy to pay especially since they get confused with " the gigabytes and megabytes" etc!
They appreciate someone who knows what all the nomenclature means and get them what they need - not what the ISP tries to force them to accept.
When clients don't understand they just go for the lowest price. That isn't always the best option - especially when they find out their 12Mbps connection the ISP said they would get is only around 5~7 and they are trying to stream Netflix to 3 TV's.