Thanks for your question, Valerie,
It raises a couple of related issues:
1. Is the survey response a valid sample? No. Surveys of this type generally tend to draw stronger response rates from those opposed to the issue or situation, and that appears to have been the case here. We have no idea what those who chose not to respond might be concerned or satisfied about.
2. Did the landlord have unexpressed concerns before hearing the complaints? If so, it would be a good idea to ask about those and to honor them by offering to collaborate in finding workable and mutually acceptable solutions.
Take a look at our section headed Learn A Skill, Item 2 and its related toolkit will give you a number of suggestions about both survey construction and procedures. You may find it necessary to attempt a resurvey, in collaboration with the landlord, that includes a brief description of tye survey's purpose and the importance of hearing from the wider neighborhood. Hand delivery to a person in each household may generate a higher response rate. Also, add space for comments by respondents, and guarantee that results will be made public without identifing any individual.