A post on another Forum reminded me of the same surprise I had in Jan 2015 when finding I had unwittingly agreed to an annual charge for "Prime". Only spotted the £70 had been taken from my account when checking bank statement!
Managed to retro opt out and get money back so may be worth checking this hasn't happened to you this month.
Managed to retro opt out and get money back so may be worth checking this hasn't happened to you this month.