Why is rewards support so terrible?

Hi PAINkillers82! My name is Ricardo an independent advisor ready to help you with this situation!

You could try to contact Microsoft support directly, this is a community forum so you will get answers for community members, the situation you face requires support access, I'm understand that you are not having the best experience on this but you should keep trying as they are the ones that can help you through this

Microsoft Rewards are their own department, and though they do work closely with the Xbox and Bing teams, they have their own support channels. What support channels are you reaching out to?

These policies are in effect to protect people from stealing an account and transferring it to a different e-mail address. Support is not terrible, in fact the agent did everything he--yes he is quite human--could do. It is not Microsoft's fault that you
"accidentally" associated it with someone else's e-mail account.

P.S.

You also gave up any "legal" right to sue Microsoft. Read the ToU.

Codes don't expire for years. The store most likely won't refund the codes since there's too much chance of the codes being used then returned. You have no legal leg to stand on as Microsoft is simply declining to fix a mistake YOU made in a time frame
you desire.

Hello KaiserMuffn,

Your feedback is incredibly crucial for the xbox community to constructively grow, I would refer to this page to submit more feedback https://news.xbox.com/en-us/2014/06/09/events-xbox-feedback-site-e3/