Need legal advice

[Long Bui]

I was a PMP on a deal and i gave my partner 3 months' worth of the mortgage in advance to stabilize the property. We bought the property via SUB2 and he has never made a single payment to the mortgage company. I came to find out 2 months after and he ghosted me. The seller and I are working together now to foreclose the house from myself and the partner so the seller can get the deed and title back so they can transfer it to me. Right on the foreclose sale date, the partner filed chapter 13 and stall more time. we came to find out that he has been living in the house the entire time as well. We need HELP.