Unbelievable service from MTN Mall of Tembisa

Last week I took an MTN contract on the ****le. They gave me a password, so on Saturday 06 November 2021, I went to MTN at Mall of Tembisa where I got my contract because I wanted to change the password. The reason for changing it is because my son was with me when I took a contract and he heard what the password is. Now he's misusing it . To my surprise that lady who was assisting me told me she's unable to assist me because she's only 3 months there and she never received training. I asked her to call a manager or any staff member who can assist and she boldly said the lady standing there is the manager and she also doesn't know how to do it. I sat there for almost 30 minutes and another guy suggested that we call 135, then choose option 3 then option 2 then option 1. I did that but it didn't give me option 1, I think it's because I wasn't using my MTN number as it is in the ****le. I used the store cellphone. I kept on trying and ended up choosing to speak to a consultant - what a pathetic and disgusting service. On the other hand, the lady who answered the call (135) wasn't prepared to listen to what I had to say. She just said you chose the wrong option. I called again until I gave up as no one was willing to assist. Then in the end being frustrated as ever I told the lady I'm not going anywhere until you help me or call your manager. Then she said let me call a senior manager, then she called. after that she said to me my manager says you must come back on Monday with a laptop and she will help you, then I asked what if I don't have a laptop. She said unfortunately we won't be able to assist you without a laptop. The other option is for you to go to the mall of Africa ad there's a guy who will be able to assist. I found that so ridiculous and hard to believe. Can someone help me? The only thing I want is to change my password and that's all.