Free trials......is it worth the effort?

Just occasionally its necessary to talk about something unrelated to research and on this instance it is the company Pitney Bowes. A few months ago I was persuaded to take a trial of a franking machine for a month. I found it useful and easy to use but as most of my communication is electronically it was of limited use.

Since then the machine has been returned but on various occasions my 'free' trial has been valued a amounts ranging from £59.43 to £95.91. Whats the most frustrating thing is people from Pitney Bowes in the UK tell me when I call up (premium rate number) that it has all been cancelled and a credit note has been raised. But then this morning I receive another invoice for £70.30 so I tried to call to be told every ones on another line. So I leave a message...will anyone get back to me? They probably will as I have already been told on 2 separate occasions it will credited; I have just yet to see it in writing.

Please let it happen soon!