Poor service

End of July I took a contract with vodacom based in Chatsworth, Durban this contact as informed by the consultant is a 20 GB data contract #wifi router# which is R200 top up, I asked the consultant several times about the spend limit and she assured me that it will stop working when its finished for the month, but non of that happened instead R950.78 was deducted from my account and when I complained the manager said I should go revers the funds, so I then ended up calling customer service and was told not too coz I will be blocked and charged. I went back to the store and the manager said to come back he will refund me and the refund was done 5 days later. Agent said she will request for migration on my account as it was on an open line, after calling customer service and finding out that I have to pay for that migration which was not even explained to me in the store. This month my "bill" was R1540 which they tried to deduct and could not coz I did not have the funds now they are charging me for wanting to cancel + money bouncing back and a fee for not getting the money on time and the migration fee, keep in mind I'm being told not to use the router up until further notice but month end I need pay. Store manager dose not come out when I go to the store the consultant keeps telling me she's on my case but I get no feed back.