How to fix Error Code 202

So you don't have to go through what I went through when I tried to sign up for the arena tournament, this is what I did to fix my error code 202:

Q u o t e:
1-) Upon entering the TBC online upgrade page, your name, your zip code, your credit card type and a placeholder for your credit card number should be automatically filled with previous data from your monthly bill or something.

2-) Clear out the Zip Code field. Fill it with your last 4 credit card numbers.

3-) Clear out the placeholder number for your credit card number. Fill it with your full credit card number.

4-) Input your security code (I think alll CCs have this. I use a Visa)

5-) Verify if all the input data is correct (except for the zip code, heh). Press submit. Voila!

So, thank you very much for the quoted poster for finding out about this, I can finally enjoy TBC like the rest of my guild!

And to Blizzard: This method proves that the faulty side is the website verification code for credit cards. For effs sake, fix it! It is so stupid that all this problem spawned because the darned site looks at the right place to verify the CC number for the bank communication and the wrong place for verifying for the website check. FIX IT!

Works like a charm, also works for anyone having problems with server transfers, buying BC online, just anything having to do with online purchases, this can fix it.