They do not pay
Agree with MightyQ - no cashback, for no reason at all other than "order number does not match" - but it most definitely does, I went through quidco and followed all the due processes.
Apparently this retailer can just choose to not pay cashback at their own whim. I would not have gone with this insurance company for any reason other than the cashback rate, as they were not actually the most competitive, and now that I won't be getting that, I'm not pleased at all. Quidco cannot do anything for me - it is at the discretion of the retailer. Very very poor.