On 17/02/14 we tried 8 times to make an online booking @ around 21.30. None of these attempts were successful as the site did not allow the booking to complete. Through no fault of ours another attempt to book had to be made @ 08.00 on the 18th. This reservation was made in haste & I failed to opt out of your travel insurance. I feel that the sale of insurance should be an opt in option. On returning from work & asking to cancel my mistake, to avoid double indemnity, as we already have comprehensive travel insurance a full refund was not available. Since 1.5% had already been added to the bill for credit card payment costs being asked to pay a further £5.00 "administration" costs for a £15.00 refund ie 25% of the value of the £20.00 charge smacks of aggressive profiteering & leaves an unpleasant impression. This is my 5th stay at your holiday parks, my last visit was in September of last year. Whilst making this booking I have not been made to feel like a valued returning customer.