The lease renewal offer wasn't an offer, it was a deadline disguised as one

Got a renewal letter that said 'your renewal offer is enclosed.' The letter was dated October 5th. At the bottom in small text: 'offer expires October 12th.' That's 7 days to decide whether to commit to another 12 months at 14% higher rent. When I asked for more time, they said the unit was 'in demand.' I left. The unit sat empty for weeks.