Worst online shopping experience!

Worst online shopping experience. Ordered white 2 x 20l Plascon roof paint. Colour not specified in order description. Green delivered- appears site orders green as default. Customer service email does not works. It took 2 hours of WhatsApp messages (being told what the system says) to find out they don't have white. THEIR SYSTEMS ARE NOT INTEGRATED MAKING IT CLOSE TO IMPOSSIBLE TO SORT OUT ISSUES.