Monthly billing more than package

In October 2014 I upgraded and selected a package which is supposed to be R649 pm, instead the invoice indicates an amount R801.99. I called 808 who advised the issue is made from the branch. I went back to the branch, twice in person and they confirmed the billing is wrong. After being advised it has been fixed and I would be credited with the wrong amounts in my Feb 2015 statement and debit order, it wasn't and I was charged yet again. I have phoned a total of about 45 times, mostly with no answer. When they eventually answer they assure me they will get back to me. I never get any responses back. I am still waiting for a reference number.<br> <br> This has cost me over R600 so far. And counting.