False products/advertising

The bank has advertised a MyMo plus account that comes with free reward card benefit. i am an existing customer to the bank and i don't believe in paying for a reward card or benefit so naturally i was interested in opening this MyMo plus account as it makes economic sense according to what has been promoted and advertised by the bank. I went to the bank waited for hours in the queue to be told that because i am an existing customer the consultant can not guarantee that i will get the free reward benefit that is supposed to come complimentary with the account. I was shocked, i never expected this

Is this even allowed, ******. sis