What the hell is going on with Aviva,

I did a quote 2 weeks ago and it was £504.00.

Last week i did the same quote and its now £1020.00

Today i did another quote, same details and it has doubled to £2010.10

WTF??

Luckily i have just renewed with Admiral and Paid £400.00, are these idiots serious? i have been with aviva for 2 years and always had good quotes, now they seem to have increased their premiums to silly prices.