Substandard Products - STAY AWAY!!!

I bought multi-flor design tiles "SELFADHESIVE VINYL FLOOR TILES" from Builders Warehouse and from Takealot. This must be the worst product I have EVER bought. My "inexpensive" DIY project turned into a nightmare. There is NOTHING self-adhesive about these tiles. No instructions on preparation of surface. Not even hours of web searches helped even when I followed the "most likely to succeed" advise on preparation. I have had to lift the entire floor and replace about 15% of broken tiles and glue each tile with contact glue. I would NOT advise anyone to buy any product from multi-flor. It blows my mind that a company would put their brand on a substandard product like this.