You used half a terabyte of unshaped data this month and were then moved to shaped, at which point you used a downloading service that's used by most to bypass shaping from ISPs (they even advertise it as such), and your download on this service was therefore shaped - your speedtests were fine, so you were not throttled at all.
I don't think we were unfair in any way here, but we will process your cancellation if that's how you'd prefer to go.
Unfortunately we will not be offering an unshaped account at the price you're currently paying, but it appears that you're expecting this. You also appear to be under the impression that bypassing shaping using certain services is acceptable and we should simply unshape that traffic because it's not p2p or nntp. We cannot and will not do so, especially when the traffic to such a service is during office hours.