Rediculous and bad service

I am so exhausted trying to communicate with vodacom. I reduced me voice package at the beginning of the month. I received a ref number that it was done. Nothing happened. I received a call from vodacom a few days ago telling me that I received a 75% discount on my modem package and that I must check the app. Nothing has changed on the app. Everything on my account is exactly the same. I warned the lady when she called that I know that I will have to call a few times before anything will be done. Promises and more promises. So tired within service