Very frustrating service

Someone transfered money from capitec bank into my standard bank account which was closed long ago. This happened on the 27th of January 2019. I went to festival mall standard bank the following day and they told me that the money will bounce back to the sender in 3 working days, fine. I went homeand we waited at least 5 working days of which the money did not bounce back. I went to the bank again and they said the sender should go to capitec bank and inquire, and at capitec bank they told her that they will recall the money and it should be in her account in 14 working days. After 14 working days she went back to capitec bank since there was nothing in her account and when the trace the money they found out that money went to the wrong account. This morning i went to standard bank and they said that my nonexistent standard bank a account was recycled and it now belongs to C du Plessis and the bank called her and mentioned that it was her mistake she did see the money anda already spent it. So i dont know what to do please assist me.