MTN circus

Dear MTN, i am having the worst experience doing an upgrade. i have had a contract with MTN for 20+ years Yesterday i tried upgrading online about ten times but i kept getting technical error. Then i went to the store... which had no fan or aircon only to be told that they don't have the contract that i want to upgrade to Today i called the 135 number and got sent from pillar to post with not one competent person able to help me upgrade. This should be simple for you. This is something you do on the daily. Firstly i was on hold for 30+min before speaking to an agent. Then i was transferred to retentions and customer care and i eventually went through to collections who cut my call because she clearly had no idea who the right person was that i needed to chat to. Its simple... my mum initially took out this contract20+years ago but i have taken over this contract and number 15+years ago. Today i am told i cannot upgrade because the ID number belongs to my mother and the name, surname and bank account are mine... ***!!!!!! Really. How have i been upgrading every 24months. MTN PLEASE EXPLAIN and guess what I'm the fool for staying with MTN after all this ****. Its been two days of making me a ****** in your circus