I took my car to Smith Cairns today to see why I have no boost / the car is bogging. They told me that my wastegate actuator arm is sticking because it seems to be bent.

They didn't service the car because they said I should put my stock uppipe back in before someone tries to void my warranty while in service.

So -- what sort of solutions do I have other than the one Smith Cairns proposed (put back the uppipe and they're service it under warranty)

I mean, im trying not to break the bank too much here, so what are my options?
Are there any other dealers that would be more mod friendly and take car of me? I do have that 80k Mile Subaru Warranty...