Refuse to refund faulty kettle as per the Consumer Act

Purchased a kettle in July 2024. When trying to return it on 14 Jan 2025 as its still under warranty, the staff and manager said they can only do a repair or a replace. We want a refund as per the Consumer Protection Act. They refuse and refuse to put their decision on paper for us to take it further. Sitting with a faulty kettle and had to go buy a new kettle. Will be taking them to the Consumer Tribunal but now wants to be compensated for the humiliation, pain and suffering including the additional costs we had to pay