The prior answers are excellent. I'll simply add that your questions are mixing several legal concepts, and it's crystal-clear to me that you need...

What can I do if the seller of a house has not fulfilled what he agreed in writing in the purchase contact to do?

Changing to Landlord and Tenant section because they will be more familiar with this issue.

Walmart took my $7000?

I can't imagine you or Walmart leaving the transaction -- surely one of the largest at Walmart on that day -- without copious paperwork. You...

How can I sue a company for taking my money without delivering the purchased product?

Poor customer service is not against the law. Wait a few days before getting mad (you're right to get worried). Ultimately, if you do not receive...

Do I have a chance of winning this lawsuit? What am I looking at possibly as far as the law goes?

You need a lawyer, not an Avvo forum. You indicated that a lawsuit has been filed, so I'm moving this to the litigation Section.

One caveat: IF you're filming other people to make fun of them, OR especially if you're setting people up to make fun of them (a-la Borat), you...

Should I Respond To An Email From My Strategic Partners' IP Attorney Re NDA?

Yes. You need an attorney familiar with Apps and software law to reply to the letter. Spend a little now ... if you don't you'll wish you had....

LANDLORD NOT RESPONDING?

I'm moving this question to the landlord-tenant section.

Yes. See; https://emojipedia.org/licensing/ Good luck!

I'm sending this to the Immigration Section because your question does not address venture capital. Good luck!