Feel like I've hit a brick wall..

Good day I am so ...so frustrated,I have been in contact with customer liaisons from vodacom,but have not received the promised feedback once again I feel let down.This is just not on Where does one go to from here ,when it seems like you've hit a brick wall,no way through,no way out .I am being billed for data and am not able to use it,I was promised a sim card more than 2weeks ago,to date nothing has arrived still and I'm losing my data.is it really this hard to keep a customer happy???