You’ve been told they were flagging you up and would need the appropriate visa to gain entry, so your solution is to ignore what immigration told you and think you’ll just rock up with a tourist visa and IO will let you enter the kingdom …? .. Quite honestly I don’t understand how you’ve got away with it for 4 years but if you’ve been flagged you’re wasting your time and money trying to enter without the correct visa. As for asking ‘will I have a problem’ …YES undoubtedly