Monte Carlo service warning, 4th time since July 27

Hi guys

have any of you experienced this problem?

July 27 my car has it's first service, and then a week later the service warning comes back on so I go to Hortons and have it re-set. Another week passes and the service warning comes on again, so back to Horton for the 3rd time (this time they said if it happens again they will have to have the car for 4-5 hours for their master tech to see whats wrong). fast forward to this morning and guess what?? the warnings back (wouldn't mind but I'm currently in Devon) so the cars back into Hortons when I get back. Has anyone experienced a car that won't accept the service re-set?

Scott