I had taken a loan against property on floating rates on my name from PNB and was paying my EMIs reg

I had taken a loan against property on floating rates on my name from PNB and was paying my EMIs regularly however in COVID time, due to no operations, I had to bear huge losses in Business and had to finally shut down the same. Post that my EMIs became a little irregular due to no funds and finally we planned to sell out our only residential property on which I had taken LAP. Now bank is levying 1.2 Lakhs of foreclosure charges and 60K of bounce charges. When I requested them to waive it off for me, the manager is threatening me that he will get a posted placed outside my property that it is mortgaged and also get the walls painted with that and will not accept the cheque from other bank for foreclosure of the loan and is insisting me to pay one EMI for which I don't have funds. I can only pay off the loan once the property gets sold. Please suggest a way out.