Insulation, sisilation I feel a cold vibration

Right sent an email to my CSO at PD about insulation for the walls.  At contract signing a couple weeks back (which went for 5 hours I must add) I discovered that insulation to the walls wasnt included, only sisilation wrap, which is that silver lined green/blue sheet you get stuck on round the outside of the frame.  Im no builder but how is that meant to stop heat loss?  Heaven knows how the 5 star energy rating still stands?  Seriously the sisliation wrap has an R rating of R1.5 which I highly doubt is going to stop the heat from leaving my precious 4 walls .... and the glucose chips that are included for insulating the ceiling are only R1.5?  Ive got a better bet digging a hole in the ground and wrapping polystyrene round myself

To be continued ....