They Are ******** me

A few weeks ago I realised that there was a problem with my billing statement because I would think I'm paying in advance but end up being told that there was no advance payment and that the price I should pay for my upgrade is R370 where as when I got the phone, the pamphlet stated that the p8 was R270 a month. when I went to the branch and reported this me and the consultant noticed that this has been going on for 6 months ever since I got the phone. he then sent almost two emails now to them but the matter is still not fixed and I am still asked to pay more than what I initially signed up for. I feel so disgusted and ****med by this service provider and I do not understand why they have not fixed the issue or taken note of it... the extra R100 that I pay per month for 6 months now should would have been put to good use, but instead I am paying for falls advertising on their part... this is sad, really sad that they would do this to me