Unprofessional condact: Seeff Strand paying my money to a wrong account and making me suffer for their mistake

Here is what happened in short

* Seeff had to pay the deposit for a rent owed by the tenant that left. * They sent me a payment notification on the 8th of August * I waited and waited and there was no payment reflected in my account. * I notified them, and they told me that they paid to the wrong flat owner and they will correct it. Almost 2 weeks later, my money is still not in my bank account.

Here is the ridiculously unprofessional point: They keep telling me that the other person who wrongly got paid didn't pay back the money. Why should I care? As a client, Seeff owes me money, not the other client. They must pay immediately and resolve their issue with other people on their own times. They don't get this.

Just imagine I owed Seeff or any other company some money and I tell them about my relationship with other people. Will they wait or they there will be penalties and interest?

This is only one of the so many problems I had with them. I am sick of them and I feel the episodes don't end.