Time wasted and account closed

My account number is: ********** **********

I opened my account on the 04/09/2017

The cashier whom I opened an account with told me I could purchase anything with my account except for cell phones.

The following day I tryed to purchase a R1000 gift card, the transaction was declined after the request for approval was made.

The following day I returned to the store to try another purchase for a R140 necklace and a R500 gift card, at the cash desk i was notified that my account was closed for trying to buy the R1000 gift card, I think this is really unfair and that I was initially misinformed as to what I could purchase and thus a lot of time wasted.