I emailed the Co-op on 25th January, and my email was forwarded (thank you) to Penrith Co-op. However I heard nothing back from them - not even an acknowledgement.
So I sent another, concise, enumerated email to the main customer relations department on 4th February. This time I didn't hold my breath. Today (16th) Ah! A response! The gentleman who has emailed me appears to be based locally (by his telephone number). He thanks me for my email and comments which he says "just came to his mailbox" yesterday. Eleven days for an email to arrive in his inbox? Do I hear the grinding of the mills of God?
He will take up my comments "directly with the store manager" and will let me know the outcome in due course.
It's not necessarily the store manager who is responsible for the inconvenient shop furniture, though, is it? I get the impression that the ordering is done much higher up.