Do I remain in debt after the bank sells the house I bought with an interest-based loan, especially since the bank kept the installments paid and the selling price was low due to the economic crisis?

If you borrowed from an interest-based bank and are unable to pay the remaining installments, your obligation is to pay only the principal amount of the loan. You are not required to pay any usurious interest, whether it is due to an increase in the borrowed amount or due to delay. If the bank has collected the remainder of the principal loan amount from the price of the house, then you are absolved. If any part of the principal loan amount remains, you must pay it when you are able. You must also repent and seek forgiveness for dealing with the interest-based bank.