I bought a pack of runecoins last week, so that I could buy the pegasus teleport and some emotes. The payment took a while to process (as Jagex payments usually do for whatever reason).
I checked my bank statement this morning and see they've charged me twice for the same pack.
So I went onto the forums and made a post asking what's going on. A mod replied within an hour saying, no you weren't, but I've sent you a message in your in-game message centre explaining the problems.
So I went to log into my account to check said message, and they've locked my account.
Went through the process of unlocking it, checked the in-game message which just said "No, you haven't been charged twice", essentially.
Now I'm cross. Trying to get in contact with one of them and send them my bank statement.