Vodacom from hell

I had a contract with vodacom ,they kept cutting my lines saying there is insufficient funds in my bank,every month I had to go to vodacom branch to get reconnected and they said it is my bank not them,because I was surprised how can they say insufficient fund while there is money into my bank ,and they said the problem is with my bank Capitec ,one day they disconnected me and I was in the middle of nowhere I wanted to call uber taxi but I was offline then that’s when I decided to settle my account with vodacom I paid R12882 to settle my iPhone 7 Plus contract because I felt that having a contract that put my life in danger is useless till today I’m still using the iPhone and I’m skeptical to upgrade with a contract phone I rather save and buy cash