Perhaps. You didn't really describe anything harassing.
LL is not obligated to give you more time, but must follow your state's laws regarding termination.
Recommend you chat with a LL tenant attorney in your area ASAP.
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Your landlord is not harassing you if he/she is asking you to pay the rent you owe. The landlord does not need to extend you time to pay and should being the proceedings to evict you through the Court system. You do not need a rental agreement for you to have a contract. It sounds to me that you have a month-to-month contract and that is a contract, written or not.
Pay your rent.
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