Having purchased my Google Pixel 9a on the 05/07/25 via Carphone Warehouse (part of Currys)... I understand there should have been a £50 Currys voucher as part of the deal. 

I haven't received this and have been to my local store who have said there isn't a voucher linked to my purchase? 

I don't think this is correct and don't know how to resolve this?