Not sure what your question is, but if you were injured you need to seek out a personal injury attorney. If you were not injured there is nothing...

Can you sue? Yes, Should you? I can't imagine swallowing a bug is going to be worth the tremendous expense of a lawsuit. You have no real damages...

You call the police..........................................................

You can certainly refuse to sign, and the LL can refuse to rent to you.

Do you have a question? Not sure what you are seeking.

Depends on the laws of Kenya, which none of us knows............

This sounds like a common scam. Real debt collectors don't cold call on the phone.

With that much money at stake, you need to retain counsel. None of us volunteers on the web knows all of the details to give you an informed opinion.

Poor management IMO, but not something for the courts to resolve.

The way to sue anyone is to hire a lawyer, present them with all of the facts, pay all necessary fees, and have them file suit.