Bad Service from Vodacom AGAIN !

I am absolutely tired of Vodacom's data service. I used to have one gig , then two etc. Now at five gig I run out of data sometimes . I purchased a 500meg bundle Friday 29/06/18 and it was finished when I tried to log into the internet on Saturday morning 30/06/18. I renewed one data contract a week ago , I have another one and two cellphone contracts running on a month to month basis . I am going to change to another provider . This dissapearing data seems to be a countrywide Vodacom problem .