The problem can be solved in several ways. For a start find out, whether you are not entitled to the subsidy for payment of services provided by public utilities. The subsidy can significantly reduce the utility costs.
Please contact utilities with the requirement to provide you with the total amount of debt including interest. In addition, find out which services were provided in the period for which you are listed funds, as well as their cost. So you will be able to exclude from debt extra payments for work not carried out.
Make an agreement to restructure the debt to obtain payment of the entire debt in several stages. If you are eligible for a subsidy, the payment plan will be required when it is received.
If you could negotiate with utilities on a partial repayment of the debt, pay the first interest amount that had accumulated by this time, and only then proceed to the payment of the principal debt. Due to the fact that the balance of the debt interest is not re-charged, you will be able to repay the full amount with minimal monetary loss.
If you have inherited flat with a very large debt on a rent then you will have to pay only the amount that has been accumulated over the last three years. This is due to the fact that the Statute of limitations of debts for the provision of public services is only three years. To begin to pay the debt in three years, divide the total debt by the number of months of repayment.
If the area of your apartment is very large, and the debt of rent is a huge amount, exchange them for a smaller size with an additional charge. The difference from the sale you will be able to repay their debts. So you get rid of debt and get a new home, the contents of which you will be able to master.