Vodacom failure to deliver

I have been a Vodacom customer for more than 10 years. For the past year I have been contacting Vodacom to resolve a problem I have but they are just not able to assist me. I have been to a branch and have called their customer care countless times but I am just not being assisted. Another Vodacom customer receives my data balance notifications. This is extremely frustrating as I always have check and sometime when forgetting to check my balance, my airtime gets depleted. It is even more frustrating for the person receiving my notifications. Just last week I called customer care again after receiving an annoyed call from the person who receives my notifications. I was assured by the operator that the problem has been resolved and I received an sms from Vodacom too. Yet over the weekend the very same thing happened again, she received the notification and I received nothing. As a loyal customer of Vodacom I can really not understand how this cannot be resolved and who it happened to begin with. Vodacom is just not assisting me to my satisfaction