The person you are dealing with is one with a doubtful character. He will create much problems for you in the future. A simple example of that is his unwillingness to give you a receipt for your payment. After several months have passed, he may demand payment for all the months you have been at his apartment. You will simply have no proof of payment you have made. I hope you understand "the game."
My suggestion is that you get out of this place asap but do it very quietly. When you take the next apartment on rent, make sure you take the contract first before you move in.