Credit card offer

Hi was phoned by a sales person whom convinced me that to have a Woolworths credit card would ne much better then having a store card. He then said that the first 6months there would be no service fee. Which was a big fat lie because after the first month I had to phone to ask them to credit the service fee. This then happend every single month. Last month I paid off the credit card and phoned to please cancel as I was told to get this by being mislead. I just received another credit card statement with a service fee.