Don't worry, there shouldn't really be any trouble. These sorts of companies have to put up with it all the time. I used to work in a call centre, all our calls were recorded, the main reason is to prevent any sort of fraudulent activities and for the company to cover their own backs, as in if a customer accuses them of something during a phone call they can back it up with their own evidence. In my own opinion I wouldn't worry about it mate. Truth is, if any one says anything, all you have to say is you got a bit heated, it is a touchy subject after all.

Legally I can't see any implications, it's verbal abuse which as far as I can see at most is a warning, if that