A homeowner is in distress after discovering their property may have been sold to multiple parties. They purchased a flat in 2016, only to be contacted years later by a bank claiming the property is under their mortgage due to a previous default. The homeowner's bank confirms their ownership and loan registration, but the conflicting information and the discrepancy in property details raise serious concerns. This situation has also affected other residents in the building, and the homeowner is seeking guidance on how to proceed, especially given the differing property descriptions.