Billing me for a service i was informed was free!!

I phoned Telkom 10210 with a billing query on 08/12/2015 around 10h30. After my query was completed, i asked the lady how much it will cost to move my telephone line, on the same premise, basically just to the other side of the house, and she transferred me to the people who deal with the moving of lines. I explained to the next lady who answered, and she also told me that the line will be moved free of charge, i can just phone them when we are ready to have the line moved. When I moved to the other side of the house, i phoned them, and confirmed that it was no charge, which they confirmed, and they sent a technician to our house to move the line. On this month's account, an amount of R481.00 was charged in addition to my normal charges for the movement of the line!!!! Now they want to suspend my service!!! This is not acceptable!! I checked and double checked, and everyone i spoke to said it was a free service, so why am i being billed for this mistake? When i phoned this morning, I spoke to Sekhulule and Andy, and was informed that the people i spoke to did not have the correct knowledge. How is that my problem? I can't pay the additional amount, so now they will suspend my line?