Incorrect information given by telkom consultant.

On 26th February, I went into the telkom store in Centurion Mall, to apply for a mobile contract. The consultant then gets me excited and says that I have been approved and she is going to get the device. She then comes out and says that the manager says they have to do a background check because of the letter that I provided, which I understood. She then says it will take upto 72 hours which is on Tuesday the 2nd of March. I get no feedback on the matter and when I call in, they say she is only a trainee and the check take 3-7 business. My thing is why get a customer excited and then wrong information. This is so not on and I am very upset.