No longer offer a good Service to customers

I have a problem with Vodacom, my contract with them was ending in the middle of August and i decided to call them n ask them to cancel my contract when it ends and the guy who was assisting me convinced me to stay with them and myb take a differnt package n we had an agreement i evn told him that Vodacom always gives me problems if it's not airtym then its data or sms's missing or not being loaded to my sim card, n he assured me that things wil b differnt but nothing has changed i made a query on the 4th of September 2017 bcoz my sms's wer not loaded only data was loaded so i called them n explained my situation to my surprise the lady hung up on me while i was twkn to her, i called again n sum guy answered n he was friendly n promised to make sure that i am being helped bt nthn has hpnd i called again last week asking abt my case and the lady hung up on me while i was telling her my story, n i called again n the guy said i shud receive the sms's in 48 hour i mean today it's the 19th n nthn has hpnd no one is saying anything, i'm the one always taking the initiative to call n ask abt my prblm i mean aftr all i am paying for the package every month n not evn once have i given them prblms with payments bt they always giving me problems if its not data gone missing, it's airtime n i was patient with them infact i have been patient n i'm tired, i don't know wats wrong with Vodacom bt they need to treat customers well n keep their promise i'm sick n tired of complaining especially knowing that i pay every month.