Oh dear, yet another satnav-assisted PCN ! It is fatal to just blindly follow instructions from these devices in London where there are hundreds of council traps to catch you out. Did you not understand the meaning of the two "Flying Motorbike" signs ?
Very difficult to get these cancelled. If there are no advance signs, then you might be in with a chance, but we can't see if there are any, because GSV is too out-of-date, so you'd need to do some leg-work with a camera.
Alternative is a fatal error on the PCN making it void, but Hippocrates has put that one to bed, I'm afraid. We point out PCN errors, but it only works for so long if the council are pro-active on these things.