Tempted to give up on Boris bikes

The latest twist in this stupid saga is that my Barclays Cycle Hire key has stopped working altogether. Seems to be a physical failure - the docking stations do not respond at all to the key being inserted. Previously they at least showed a yellow then a red light when I tried. Now it just does nothing. 12 minutes on the phone with TFL did not improve matters: first they claimed that one of the docking stations might be faulty, then that the problem was with the auto-renew feature (same as last time). Then she claimed that I had made a journey already today (not true). Finally she charged my credit card for another day and then, as I fully expected, the key still did not work. The new access period has been confirmed to me by email - twice - so perhaps they've charged me for two. The web interface has no record of anything that's happened today, which makes sense if it's a physical failure. They're sending out a replacement - which will take three working days,...