New WiFi pricing not very flexible.

We ran out the rest of our WiFi on the old voucher system and decided to purchase £10 of internet on the new system but were not made aware that £10 was for 7 days and once you log on your time starts, and as we were at Black Horse Farm campsite then moving on to France next day we were surprised on arrival back there 3 weeks later that we had no credit as it had run out. On the old system £5.00 lasted us all last season and into this season. In my opinion this is not very cost effective and we don't want to be on the internet 24/7, we just need 30 mins or so just to check emails, Facebook etc. We will be heading for Mc Donald's or local pub or cafe with free internet in future, a definite retrograde step back in our view.