Vodacom data sim from hell

Hi I have bad experience with my vodacom data sim contact. I really sick of this service provider and the lie they sell us. They collect money from us every month but dont deliver on what we paying for. I bought my data seem three months back and all been getting is bad connectivity. I cant do this anomore. I have 10 gigs of data due to expire tomorrow but whats funny is that the data fkr month of alril is depleting instead of the due to expire tomorrow. This is day light *******