Loss Of Power In Turbo

[Rossj1990]

Hi fellow ford drivers, ive got a fiesta zetec s 1.6 tdci, wondering if anyone is able to help, my turbo recently blown & had a reconditioned one put in, had oil change & oil feed pipes changed. Drives fine but seems to be slower than before it blew, turbo seems sluggish & have to put my foot to the floor to gain power especially in higher gears which I didn't used to do before, any suggestions what it might be? Thanks :)