Unfulfilled promise

Sir/Madam

My name is Caroline and have been banking with FNB for quiet some years now. Well, I went to one of FNB branch in Pretoria, Wonderpark to be specific and during my consultation I was told about fusion account where I ended up switching from Premier Cheque account to Fusion account and interestingly I received a sim card and promised to receive 1GB data monthly as part of the package but I'm not receiving. As the results I went back to the branch where I was given a number to call and check the reason for not getting the data as promised. Surprisingly, I was told that I ain't gonna receive it simply because I have an existing FNB sim card (which I got with the contract phone)

I find it totally illicit for the client to be misguided for what she was vowed for. I am talking about the two different simcards here and of which I wasn't told its pros and cons. I wasn't really looking for a financial facility but I didnt think twice about changing my package because of the data promised.

Kindly assist me to understand why FNB is promising clients like me something that it's not doable. What Am I to do with the sim card now, chew it?

Unhappy,disappointed client ***