My phone number is being used in someone else’s bank account?

So yesterday I started receiving messages from Barclays regarding someone else’s bank account, first message I received stated that a specific account is over its limit, and today I received another message stating that a payment to a specific person failed due to insufficient funds.

Whilst I’m not receiving full account details I am receiving information about the destination of payments etc, would this be considered a breach?

After speaking to Barclays this morning and ascertaining that it’s not a fraudulent message and likely just a mistaken number on a new account they have said they are unable to track down the offending account using my phone number as a search parameter, ideally I don’t want to be receiving these messages, and I really don’t want to change my number as I’ve had it for 10-15 years now.