You can't cancel a reservation in someone else's name. You can agree to pay for a hotel room for someone else, but agreeing to pay for it doesn't mean that you are in control of the reservation. If the reservation is in your grandmother's name, it's your grandmother's reservation. The only exception to this is if a TA books it for you. Then the TA owns the reservation and nobody else (not even the guests themselves) can cancel it.
This isn't fraud. It's common practice in the travel industry. If I have three rooms as part of one group booked through our travel agency and one person calls and says the group wants to cancel, I need the lead guest on each reservation to shoot me an e-mail or give me a call to authorize the cancellation, regardless of who's paying for it. This is to protect everyone involved.
I know your grandmother didn't want an MDE account, but that would have been the easiest way to get around this: create an account for her, link the resort reservation to her account, then cancel it online. Or...just have her over for some tea or something and chat while you're on hold, then put her on the line to tell them she wants to cancel.
This isn't fraud. It's common practice in the travel industry. If I have three rooms as part of one group booked through our travel agency and one person calls and says the group wants to cancel, I need the lead guest on each reservation to shoot me an e-mail or give me a call to authorize the cancellation, regardless of who's paying for it. This is to protect everyone involved.
I know your grandmother didn't want an MDE account, but that would have been the easiest way to get around this: create an account for her, link the resort reservation to her account, then cancel it online. Or...just have her over for some tea or something and chat while you're on hold, then put her on the line to tell them she wants to cancel.