Mtn pathetic and disgusting service

What a disgusting service from mtn agents! I called on Wednesday regarding a network locked phone, the agent promised that the manager will call me back because she's working from home, no manager is available. I waited until today then I decided to call again, the agent was so rude to me said they can't help me, however, I was previously assisted with the same issue and was resolved, I asked to speak to the manager and rudely said there's no manager she's working from home, I asked her to get the manager to call me she said that won't happened coz there's no manager and she dropped the call. This is so pathetic, mtn service is beyond poor I can't even find the name fit for it, I called again got the same response that she's working from home but will get me someone who'll assist me but the call dropped, I'm very frustrated and fed up with mtn and it's agents who seem not to be trained about how to speak or handle customers with respect and do their job. Something must be done about this asap, I'll be waiting for feedback as I need it to be actioned. My email address is ***