Fully regret renewing my contract

After a fruitful 3 yrs, I renewed my contract only to be disappointed on the 1st month. I was told that I would be billed R191 as from end of October, come month end R392 was deducted. Nobody brothered to tell me that the new bill was already out when I took the new contract. Tumi from retentions tried Assisting but did not yield any positive results, Gugu from finance (cant say much cause she did absolutely nothing) its the third week of my complaint which I initially did on the 25th of October and still no response from Netstar. I don't need much just my R200 refund. If I knew this would happen, I wouldn't have renewed my contract.