Poor customer service service agent sounded asleep still no assistance

Wow i am at loss for words after three years of being a client i am struggeling to just be assisted with an upgrade 🫣 so MTN has enough buisness ? Started wednesday made the appointement for the agent to phone me yesterday he phones me 15 minutes later than the arranged time i can still deal with this, only to be told i will get back to you i need to wait for accounts to my surprise never phoned me back 😫 now getting really frustrated i phoned again this afternoon waiting for more than 20. Minutes when a lady answers the phone with a terrible tired iritated voice now i get that people are tired bit surely just sound alive with this being said i asked her if she is very tired she sounded drunk more than anything else She then tells me i offended her me the client gets cross questioned just because i asked if she is tired! Well i asked to soeak to her supervisor as there is no way she could assist me she was making no sence what she saif so this call went great i put the phone down and wasted another 30 minutes so much for getting assistance what ****py service very disgusted in MTN this is what i get after three years not missed one payment