Well done Terry! A valiant effort. Yes, seeds were "planted." The Well Indoctrinated Witness Mind is the rockiest sort of soil; nearly solid rock, but perhaps a seed or two found a way into a crevice or crack where it may take root and split the rock.
You felt physically drained following the encounter which is typical. One of the two was more experienced in the art of "making the sale" while "deflecting the seeds" and you clearly felt his psychic pressure to break your resolve. Standing up to that sort of pressure, which originates with the Father of the Lie, can be exhausting. You did it well!
It is true that wickedness took hold again following the flood and re-population, but, that was in the Great Plan. Satan's essential job was far from finished.
Stage One - eliminate (or greatly reduce) the Nephilim Influence.
Stage Two - Employ the Lake of Fire to finish the work of eliminating wicked desire. What is yet to come will be much different.
The Lake of Fire is not fatal to Mankind.