Confused with O2 Insure Premier

[princessneptula]

On the 18th of July, if I remember rightly, I paid off my phone and switched to sim as it was cheaper for me at the time. While I was there I had asked if all the insure would come off it too as I didn't want it any more. I was told yes it would.
Looked on My O2 a few days later and saw the bill was about £30, shocked I went to the shop and asked about it only to be told I had to wait 30 days for the insure to run out. Was not told this in store but that was fine.
Today looked at the bill and it says I have to pay £30 again! I am so confused! My bill money comes out on the 17th of each month. I don't wont to go down to the store and "demand" to know what is going on, if it is a mistake on my end. Did I hear the person wrongly when they said about the 30 day thing.
Can someone explain this to me at all?
Thank you

[MI5 · Accepted solution]

Yes, you would need to give 30 days notice but if that has been completed you shouldn't have to keep paying.
I'd call cs on 202 and confirm your cancellation.