I have called my landlord on numerous occasions to inform her of the issues with the sewer backing up into the basement. She has told me that it is my fault and that we need to hire someone to fix it. This has been an issue since we moved in and has recently started to flood the basement. The landlord said it was my fault for pouring grease down the drain, which I don't do. I need to know how to either fix the sewer since we pay good money to rent this home and don't have the finances to relocate to a new residence.