Another case: I was visiting a local Walmart, when I came across the PM section that had a sign saying, "Free Voicemail". There was no expiry date on it, or any indication that it was time - limited.
I called *611 to request free VM. The rep replied that free VM was time - limited, and that it had expired. I politely countered that the sign had made no mention of the above. He then agreed to add free VM, for 1 month, to my account.
After doing so, he advised me of my new phone number! When I asked him why he had changed my number, he replied that a promotion could not be added to an existing account, which sounded like an illogical reply.
As far as I am concerned, it was pure vindictiveness on his part to change my number, and inform me of same only at the end.