YouGov review: Locked out of account, haven't received reward I redeemed points for.

I've been a member of YouGov for years and never had a problem until recently. I finally got to the 55, 000 points needed to redeem for a $50 Amazon gift card but I didn't redeem right away. The next thing I know I suddenly don't receive a requested login code and can't access my account. I tried daily and requested a response from support, no response. This went on for about a week and I got an e-mail that directed me to a page where had to re-enter all my info as if I was a new member. I was then able to access my account and redeemed my Points for the $50 Amazon gift card. A day or 2 later I again stopped receiving a requested login code and haven't bee able to access my account for over a month. I have made many requests to support but only get a canned response, no explanation, no login code, no gift card, I got the reward verification e-mail 6/18/2021 that said I would receive my reward within 3 weeks, still nothing.
I don't know what horrible infraction I committed that warrants not only an account lock out but withholding the reward that I spent years on their site to earn.
E-mail reward verification below:

YouGov
yougov.com

YouGov Reward
Yahoo
/
Online

YouGov
To:
[protected]@yahoo.com

Fri, Jun 18 at 1:13 PM

YouGov

YouGov

You have successfully redeemed your points for $currencyValue Amazon e-code.
We are processing your request, and your e-code will be emailed to the

The only response I have received to numerous support requests is below:

YouGov
yougov.com

Re: Unable to login
Yahoo
/
Online

[protected]@yougov.com
To:
Sndguymee

Wed, Jul 28 at 1:33 PM

YouGov Support Email
YouGov
Dear Sndguymee

Thank you for your email. We have received your request and will look into it as soon as possible but in the meantime you may find the answer you are looking for in our Help Centre.

YouGov
YouGov © 2020.

I've received this response over 10 times but nothing else.
Thanks for any help you can provide.