Absolutely terrible service at Mtn Customer servic

*** , I contacted the Mtn customer service regarding a sim swap, I requested a team leader to assist me as the agent Promise Majozi skills and knowledge were below average , the agent advised me that her team leader Winstur Meso was busy , a customer as huge as mtn had only one t/l available, there was no knowledgeable person there to assist me,my query has not been solved even after being on the line for 30 minutes, I have been a customer of mtn for over 10 years its sad that a service provider as big as mtn can give this sort of service delivery utterly pathetic , I was promised that the t/l will contact me as soon as he is available I'm still waiting