Refund of security amount from pg owner on medical grounds

sir, am a girl(an upsc aspirant) recently i developed hyperacidity and in the starting stage of ulcer and when i asked for food(without red chillies) to the pg owner she refused me to do so rather provides me boiled half cooked or previous day leftover food.even her pg name is mentioned in made easy coaching recommendation list and it is in residential area.neither she accepts payment via e-modes nor gives any receipts.but took a sign in the form mentioning one month prior notice for security deposit.is there any legal way to either get security deposit back or have food of quality standards w.r.t medical issues.or any legal way that could help.it's a really humble request. thank you sir in advance