"Gtechniq Ceramic Coating"

I paid over £1300 to have my vehicle coated with Gtechniq Crystal Serum Ultra. Firstly, the product failed within the first couple of months and had to be re-applied. Secondly, it has just had it's first annual inspection (of a 9 year guarantee) and the product has failed again. The Gtechniq rep came to have a look at the vehicle and said I was responsible for swirl marks and had completely rubbed off the product, despite the fact I used a pre-wash, two bucket cleaning practice with the recommended cleaning mitt, followed by the shampoo they provided. Came out with some bull about there being a film not visible by eye which I've rubbed into the paintwork. I took it for an independent inspection with a company who have a fantastic reputation and they confirmed the product had failed. I contacted Gtechniq again and they are completely unwilling to do anything about it. My car is flat black paint and they say it is too soft for their product, but they failed to tell me this when I was paying the money. Avoid at all costs.