Our landlady raises the rent, although under the contract she does not have the right..

A security deposit when renting an apartment is a kind of security for the fulfillment of the tenant's obligations to the owner of the apartment. This means that the tenant undertakes to return the apartment in the same condition in which he received it, with the payment of all debts incurred during the lease. If you want to return the deposit, you have the right to do so (the amount and form of the deposit (a sum of money or other property) must be specified in the contract). If the deposit is not returned to you, you can file a lawsuit in court for the return of the deposit.