Abusive and arrogant

I do not think I ever dealt with such arrogant and abusive people as those working for this company, especially at the Collections Department. They call me every morning looking for a Mr. Anderson. I tell them I am not this person, I do not know or related with them. They rudely put the phone down only for someone else to call the following day with the same query. This has been going on for months now.

Everyone I talk and complain to arrogantly tells me to block their number. But every time I block one number from Cell C, they call me from a different one. After one such call this morning, I phoned customer care and spoke to a Nokuthula. She refused to give me her last name, take my complaint or transfer me to her manager. She said her manager's name is Viola - she claims not to know the manager's last name.

They both insist that before they could help me I must give them my ID number. I told Nokuthula that I am not a Cell C customer and therefore she won't find my details on her system. I gave my mobile number and she confirmed that, indeed, I am not their customer. Nonetheless, she refused to help me unless I provided my ID number. In her patronising manner she said she need my ID number to help me because I might have been trying to get hold of Vodacom and I called Cell C by mistake.

Like I would not know the name of a company that abuses me every single day. I complained numerous times and kept being told that my number will be removed from the system. I have sent emails. What else must I do against this indifferent behemoth? Their staff operate with impunity.

At one point someone told tell me that perhaps I took on a mobile of someone who used to be their client and absconded without paying. I have had the same number for over 20 years. The only number I have ever had.

Does anyone know how else to deal with this? I am so frustrated.