False information

I was called by African Bank and I was told that I had won a phone from them for being a loyal client with them and always paying them on time. They gave me the phone that they said I had "won". When I arrived home the phone didn't work, it didn't read any sim card that I inserted and to make matters worse African Bank debited about R900 from my account. I went to the branch(African Bank) to ask about this and I was told that the phone was not for free, it is actually a contract phone. I then asked them to at least fix the phone so i could pay for something that I'm using. It's been 3 years now and I still don't have the phone. Please help me fix this matter because it has been frustrating me for too long I don't know who else to turn to because every where I go i am given the run around. My name is Sebenzile Mdlalose my number is ********** 606