Overcharge, installation charges for existing line, no explanation, highly disgusted with their service!!!

To rate even 1 star is giving to much credit. If I could have rate - 10 , that would have been my option! I took over a business and did change of ownership, it has taken since June, then after a huge fight it was done in August. I had to pay 700 deposit, although it is a well established number for 13 years.. and also was charged for another 638.00 installation fee. They charged the old account 301 for September usage, and also on my new account for September. I have logged the calls, after a long frustrating wait, just to be advised that the deposit was standard and they don't know what the additional charges was for as it was another devision. My debit order went of last night.. and still there is no clearance as to why I had to pay for installation for a line that was not installed, nor a deposit . I will never, NEVER recommend telkom to any customer!!!!