Bad service, missing data!!!!!

I have 2 cell phones and 3 routers on contract. In September after 1 week my 5gb router has run out of daytime data. This is impossible and has never happened before. I only read news24 and do very few wsapp calls. I got a message "login/Authorisation required" when trying to connect to the router. Not knowing what this message meant , I reported it on the 9th of September. A female contact person did not know what I was talking about and told me to switch the router off for an hour and then switch it on and try again. That did not work and I was told to go to a Vodacom shop because the router is faulty. I do not have transport and decided to phone again on the 10th. This time a gentleman assisted me and told me that I do not have any data left. 5gb in 7 days!!!!! Impossible. What has happened to my data? Vodacom call centre cannot assist and depending who you talk to do not even know what you are talking about. I'll will look for another service provider once my contract expires????