Paint peeling with no after sales support

We have been renovating the past 3 years. So far 3 phases. Each phase we used the same painting contractor. Bought the paint (Plascon) at the same City paint and tool branch. Never had a problem until phase 3. 2 of our feature wasl the paint hasn't cure in certain sections even after more than a month. We keft the rooms for 4 days before we moved the furniture back in and even then only slept one night and then were away for a week. After a while we noticed the paint started peeling. You can scratch it off eith your nails. Plascon sent a technician out, but they just concluded that it is a high traffic area and normal. Like I said we used the same preparatiin process with the same contractor and none of our other walls does this. Plascon sent us a report that was very generalised and placed the blame on us. We rep**** with details that contraindicated their findings. Nor Plascon or City, Paint and tool had the decency to answer our email. No customer care or after sales support was given in this mateer We are highly disappointed with the procuct and after sales support