Endeavoured to get insurance for my car on a Sunday so that my cover could start next day. Was given reference number by "compare the market" and was directed to Vavista website. Entered the required details but for some unknown reason my bank details were rejected. The web site invited me to try again but every time I did the site simply told me that "session over". I tried all ways to start a new "session". On the Monday I made a phone call to Vavista and was told to try again and revisit web site or the insurance would be £20 more.On three occasions these phone calls were made and three times the web site informed me "session over" before even being given the opportunity to enter my bank details. Ultimately I purchased the insurance by phone by giving the same reference number that I should have been able to use on-line. That cost me £20 more. I must stress however that the staff who I dealt with on-line were all very friendly and courteous, and did inform that there would be the extra charge. However the website was not allowing me to do this so I did purchase my insurance over the phone.