Thanks very much everyone
While it's not a low, low orbit, it is reasonably fast and i didn't set out with tons of fuel, I took 'plenty' to get me to the orbit, but I don't expect I have the Delta V to just turn around and go the other way. Thanks for the tricks on other ways to reduce the delta V requirement, useful info for the future, and as for reverting to launch... yeah... I've done a good 8 or so other contracts and gained a bunch of science since I launched that satellite (though it would mean I wouldn't have yet launched Jeb's ill fated attempt to land on the moon but forgetting to take any solar panels because I thought all engines produce electricity... Rather than lose him stuck in a Muner orbit I just let him hit the SOI and then come back with some high Mun science).
I think I shall probably use belwing's third suggestion of the de-bug menu this once as it was a genuine 'I thought I was going the right way' sort of thing because I thought I had to be going up to the Apo on the side where the Ascending node was, and towards the Per on the Descending node. It seems that these are associated with your own orbit rather than the required orbit >.< I do however now know for future so if I mess up again it's absolutely my fault and I shall either have to revert, turn around, or just send up another.
Having said that, sending up a new one and seeing if I can get such a spot on orbit that I can collide them would be quite fun