I have an 08 sti hatch. I pulled up to the lights and the cars idle was very rough then stalled

So the car was rebuilt less than 5000kms ago.... Looks like one of the idlers pulleys is seized and been slowly shredding it... My question is I had the car rebuilt under stat 3 month warranty. It spent nearly 2 months being rebuilt... Is there a warranty on a fully rebuilt engine? The timing belt was also replaced when the engine was rebuilt..

So I have legs to stand on to ring the dealer I purchased the car off and get it repaired?