If the Delta is the same as the 08 on Bravo or Giulietta, then you remove the rear covers of the centre console and that reveals the handbrake mechanism and there's a 10mm nut on the short handbrake cable. It's good practice to loosen off the cable and drive the car for a few days to get the calipers self adjusting mechanism back to operation. After a few days, adjust to no more than 4 notches, hopefully it will all work out. If you have to change the rear brake pads, just be aware that the left hand caliper is also left-hand thread to wind back in!