complain about the company

I had a complain about telecom directory, they sent me a form via our office email without informing us anything, the sent the form on the 11th of September 2017, when i was about to knock off one their employees called me , telling to fill in the form and send back to them i told her i'm not the owner of the company she told i can also fill and send, i did send the form and send to them, to be honest i didn't read the form knowing that is Telkom may be they want update the system, because we are using telkom wifi and our land line. The thing that make to think so is because of the email they gave: Email: ********** . The following week they sent an invoice of R8189 which we must pay, the physiotherapy called them what was the invoice they said is for the form that we sign for our company to be advertised, she told them they must cancel those, because they did call her as the owner that they are selling their company adverti*****t they argue until she gave the phone i told them they told me to sign, while i told them i'm not the owner, so they are refusing to cancel they are saying we should pay R3500 for cancellation and i' m the one who sign i should be responsible for the payment i told i don't have the money they never explain to me what was that about, so now they want to take me to the depth collectors, i told them i don't even earn that money, i told why they did told us about the money before they do their to honest i was not aware, i wouldn't have sign the form without the concern of the owner. So help me . The person who spoke to me is pume and the office number is ********** 205. Please help me.

I will appreciate if this problem can be solved

Thank you

With regards Letty