mr t said:
It's called 'mind games'. Don't answer or disconnect the call - just stick it on top of the telly and let your ex use his credit or freebie minutes up rather than actually acknowledge him in any way - he'll soon get sick of it and find something more interesting to do. If he dosen't the chances are he may be a phsyco with issues!!! Good luck.
Most of the time when he does it I answer and then leave it on the side or in my bag but I think he's listening to whats going on in my background. He using the work phone so he stays on til I eventually hang up.
I was out with my lad mates after Stoke last week and one of the calls came through. I answered and left it on the table in the bar and when I went back over 15mins later he was STILL on it!!