Hi I've had to take out a credit card to purchase something I've only spent £40 and plan to pay this back on Monday. Will I still be charged interest and fees by using the £40 today until Monday? I don't want to get into the habit of waiting a month to clear it and I don't really want the credit card to be honest it's just quite helpful atm. It's the Vanquis chrome card apr is 59.9% 