I bought a g$100 gift card and never received it on email or text

Make sure it didn't get directed to junk mail.

Click on this link to find out how to 'Resend iTunes Gifts' --> https://support.apple.com/HT201783#resend - "If you sent an iTunes Gift and your recipient can't find the link to redeem it, you can resend them the gift from your iPhone, iPad, or iPod touch or your computer. When you resend an iTunes Gift, the recipient will receive another email with a link to redeem the gift."

There is nothing I can do about this. I am just another consumer user like you. Read the documents to which I provided links and use the resources in those.