Poor customer service

I lost my phone in December, I've been trying to blacklist it and it hasn't been done until today. I have called the customer service several times, each time I get the same story that I should call back after an hour because they are offline after being kept holding on the line for 20 to 30 minutes. Today I called again requesting to speak to a Manager I spoke to Khanyiswa which was very rude, she refused to get the manager and told me that "andisoze" I will never speak to her manager and she ended up dropping the line. She displayed total incompetence and a poor customer service throughout the call. The consultants that I have spoken to so far, they seem like they don't know what they are doing and have not done any training at all.