Aviva calls

"Automated voice claiming to be from Aviva and telling me there were 2 suspicious transactions on my account, one for £799, the other for a much smaller amount which I can’t remember. I’m not even sure Aviva offer financial accounts and I certainly don’t have one. I was told to press 1 to authorise them? I hung up but my assumption is that I would have been asked for some personal or financial details with which they would take money. Incidentally this call wasn’t long after a call from a “Cheltenham” no. telling me that there was a suspicious £800 transaction on Amazon, also reported."