For the past few days when going 2 bed we hav heard a noise up in the loft so me and the father went up and seen a fair bit of installation ripped into pieces. Last night the noise was a lot lounder so we put up a wireless camera and stood some poision on the floor we seen 5 rats eating away at the poision but there is defintly a family full. When pest control come out all there using is poision but the rats are unbelievable any suggestions ?