Me too, but with the online login system. Tried it, didn't work. Went to local office, still didn't work despite staff trying repeatedly. Ordered another number: still didn't work, so wrote to Hmrc with my income details instead. Hmrc didn't like this either, and charged me £100, which I paid. Thought the matter had been resolved but no. Had a letter informing me that I would be charged at a daily rate unless the online return had been completed. Tried to ring them to explain-yet again- that the online system hadn't worked for me. Spoke to a computer for a while until I got fed up of waiting after half an hour. Eventually decided to write again, using my doctored 2013/14 return to record the same info as I'd already sent.
I knew I was beaten when I threatened the computerised voice with the Daily Mail..