Charge 5 and my experience with Customer Support

[SunsetRunner]

My Charge 5 has died after just over 2 months (received early June 24). I'm trying to get help from Fitbit support, but they're claiming that the e-mail address I use for my Fitbit account (I give a customised e-mail address to each organisation I deal with as part of an anti-spam/legitimacy strategy) isn't recognised.

Fitbit support claim that my e-mail address isn't being recognised by their systems, despite the fact that it was no problem 2 months ago in June. They're basically refusing to help provide the legally required warranty replacement device unless I move my account to google, which I don't wish to do.

How do I get someone to actually help me get a replacement device without doing something that I don't want to do?

Or should I just dump Fitbit?

Moderator Edit: Clarified subject

[MarreFitbit]

Hi there, @SunsetRunner. It's nice to see you around the Fitbit Community Forums. Thanks for bringing this to my attention, I'm sorry to hear that your Charge 5 stopped working. We‘re taking your comments and sentiments in regards to our products and services into consideration.

Even though I truly appreciate you took the time to come here and express your feelings towards your experience with your Charge 5 and also want to find a resolution to your issue, my best advice is to keep the conversation with our Support Team. Note for this kind of inquiries/cases/process, there's not so much we here in the forums can do for you as this is something that our team handles based on our policies.

Thanks in advance! 

[SunsetRunner]

The support team are refusing to provide a warranty replacement (as required under UK consumer law) unless I change to using a google account which I'm not willing to do as I previously stated. Therefore, they are not willing to provide me with the legally required warranty replacement device.

I have already contacted the relevant UK legal authorities to highlight this failure with them.