I rejected a replacement stem, an updated one or a repair and CRC gave me a full refund as i moaned about not trusting them and that i had bought a different stem from another manufacturer.
Here is the CRC blurb.
We have received your warranty claim for your stem.
We work hard to process all warranty issues as quickly as possible. The Manufacturers’ policy, in this instance, is for their Service Centre to inspect the item.
We have sent your warranty item to the Service Centre, via the fastest shipping method, for their assessment. Please be aware their decision and subsequent action (reject\repair\replace) could take between two to three weeks, this is due to transit times and ensuring the best solution.
We will keep in touch with the Service Centre to ensure the fastest possible turnaround and to get the results of their inspection. Be assured we will keep you updated with any information we get as your claim progresses.