Here's what is says in the email I received ...
"
We are contacting you as you redeemed an Access Code to purchase tickets for the FIFA Club World Cup 2025.
FIFA have released additional tickets within the Manchester City allocation at a cheaper rate. We would like to give you the opportunity to purchase tickets at the discounted rate using the access code below.
If you have already purchased tickets, you are able to use the below code to purchase tickets at the discounted rate, then claim a refund for the tickets you purchased originally.
Please click here for a guide on how to claim a refund.
As ticket availability is not guaranteed, we recommend purchasing tickets before obtaining a refund.
- The access code can be used until 24th February 2025, or once the tickets sell out.
"
The email came from
service@service.mancity.com, so I think you're best contacting the club.