Step 1 : Have a meeting wif the person currently staying there ... if they're trusty, then:
Step 2 : Get their tel number - phone teklom and get them to do the check to see if the line can do ADSL. If yes - then:
Step 3 : Fill in a Line-Takeover form. I cannot remember what this is called exactly, but you just takeover the line, no connetion fee's and stuff, and you can set a takeover date. This form should be gotten from local telco office.
Step 4 : Once all stuff is signed [rent/purchase deal] - put a proper order in for your ADSL line using the "TakeOver" contract as the proof of ownership - and start praying that they get the timing right - try to get it as a "self install package". This should be done on phone.
Step 5 : Pray .. and remember to cancel your current stuff.
You will loose your TelkomInternet email's - back them up. They have never ever gotten that right [that i know of of course].
The reason they must be trusty is cos you keep their phone number, and you dont want peeps calling you at 2 in the morning asking for packages mkay.