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Ugh, it's so awful when landlords are like that. There are some that actually care and others that are definitely in it for the money and don't actually care about the people that they are renting to. Do you think your mom can get a consultation with a lawyer to see if there is anything that can be done legally about this? Sometimes the consult is free, and sometimes they also say they won't get paid unless you win the case, but that's not always guaranteed. I've heard of people withholding rent and putting it into an escrow account until problems are fixed, but I'd say to consult a legal professional before going for that. I'm sorry that this is happening!