I found a similiar thing regards to my home insurance.I have always been with Pru...they are very good when it comes to a claim...would not have any other.
Four years ago I made a claim for a lost passport and a laptop within three year period so my premium went up( because it was within the three years.).
So one day I decided to look online ,Moneysupermarket,and Pru came up with a cheaper price than what I was paying even tho` I entered the claims etc.
So if I had cancelled my present policy and took out a new one,it would have been MUCH cheaper.So decided when it was due for renewal would do just that.
However,when my renewal notice came,the premium had dropped and has continued to do so...so I left it.
It is not fair how they try to entice new customers with "great" deals!
Virgin is another big example,I have been with them forever,have the whole works,yet when I see some offer which I am interested in...it`s "oh that is for new customers only"...totally,totally unfair!!!