Poor service to a loyal customer since 2003

Hi I'm so ****ed off with mtn coz I went into a store to upgrade my contract as the online app said im due on 2nd July 2021. I tried to upgrade 2nd week in June and it said u are not eligible for upgrade now you can upgrade from 2nd July. the person said I'm doing an early upgrade so I must pay an amount to upgrade as it early upgrade but I've been with mtn for a long time and when it said u can upgrade from certain date I did with no hassle. now the said mtn has changed their Ts& Cs and I never knew that even the monthly contract to 36 months & pay more if you want 24 months now what's bad about it is if u take 36 months the warranty is still 24 months now that's pathetic coz if your phone breaks in the 25th month it becomes your cost. because of covid19 lot of people lost their jobs or took a pay cut. and I know lot of people can't afford to renew contracts so others must pay mtn for maybe lost revenue ( that's my opinion) the worst thing is you go in expecting to renew contract knowing its simple like always now how embarrassing it when u go in there with other people there and they think why u coming in here and wasting time in front of queue when u not ready catch a wake up MTN