I've just had a Eureka moment and those of you reading this first and will save yourself hours on the phone can buy me a pint pre match next season.
I chose to pay my 16/17 ticket by DD when I renewed it recently. I'd always paid in full previously.
Instead of choosing the long queue when ringing, I chose the DD option and was instantly 2nd in the queue. 30 minutes later and after being extremely nice to the girl who answered (who admitted she shouldn't really be doing this), I'd relocated.
It's probably best not telling them that you've read the handy hint on here, and, simply dress up the call as a query on how the DD works or something.
Good luck blues.
I hope I've helped you.
If you only read this in 30 minutes time, others have seized the initiative before you!