That sounds more like a hoax of a scam. I doubt the phone system works that way.
> When do you stop paying for a phone call?
> Call charging ends when the telecoms company disconnects the call. This is usually but not always when the caller hangs up and the call appears to end.
> Voice calls The caller originating the call must hang up for the call to end. The person receiving the call may hang up, but this will not end the call unless the originating caller also hangs up. Only when the originating caller hangs up then will call charging end. You should always check you've replaced the receiver correctly. If you have any concerns that your call has not ended, you should check that you have a dial tone - this indicates the previous call has ended.
Here's a story from the shitty Register about this method of scamming people:
I don't think I've ever heard of anyone being harassed in this way. A few pranks, maybe.
The behavior certainly isn't replicated on mobile phones.