Always an issue with Cell C

My fiance got a wifi contract probably about 1.5 years ago, the sales lady that helped her did something wrong, which meant the wifi was uncapped, which wasn't supposed to be the case. She went back and told the sales lady and the manager that they *****ed up... My fiance still pays the whole amount for the wifi.. The sales lady said it's fine... She'll take the wifi and pay the money back to my fiance monthly.. Usually that happened up until last month.. This month my fiance got nothing.. She went to the store.. That sales lady doesn't work there anymore and they apparently have no number for her... Which is pathetic and seems like an excuse. My fiance needs her money as that sales lady is getting wifi now, and not even paying for it. The contract is almost up... We don't want to pay for it, we don't want a different router.. We want her R300 back monthly which that sales lady is basically *****ing from her now. So please contact me here or give me an email address, so you can figure this out? As I mentioned, the manager also knows about it. I don't care what happens, as long as my fiance gets her R300 back monthly for the last 6 months or however long is left.