Shopping for clothes

Going shopping for clothes is depressing and often humiliating.  I went into John Lewis, looking for a woollen coat or jacket in these sub zero temperatures.  I couldnt find anything above a size 18, and didnt know where to look for 'plus'size clothes.  I asked an assistant, who said, oh..well, what size do you want - we do go up to a size 18.  I asked if there were any larger size sections.  She said...ohhhh..no, she didnt think so, but I'll just go and ask someone. And off she went to ask a gentlemen who came over and said:  WHAT size did you say you were after?  A size 22 or 24 I mumbled.  Oh, no, no we don't go up THAT far...mmmm...not sure where you'd go for that sort of size.  Thanks, I said.