Turbo faulty.

[pioneering18]

Please can anyone advice me on my Peugeot 3008, the car was left standing for about 6 weeks, it has been making a bit of a squeaking noise for a while before I had left it parked, when I drove it this time after arriving at my destination I noticed the noise had dramatically increased plus loss of power, had to call out the AA, he said it was the turbo, so he fiddled with it a bit, the noise lessened, but still had low power, today the car is blowing out blue smoke, went to Halfords, put some turbo cleaner in with the diesel, someone said it is giving out blue smoke it is too late to put the turbo cleaner in, would appreciate some advice. Thanks.