Poor supplier

At first the experience with the supplier was great, then it came to supplying the injectors, they arrived with the calibration information deleted. rendering them useless, when I advised them of this, they asked me to return. They would then source me another set, which has not happened. I have requested a refund which too has not happened. And now dealing with the owner Dirk Otto who has turned nasty and aggressive. I would strongly suggest not using them.