I'm surprised you didn't get a KDR.
Even systems post doesn't suggest that there is a lower limit that a KDR will be provided for.
One thing that really got me, was during my CPL (A) exams, i had to hand over my worksheets before I was given my KDR's. That irked the hell out of me... I no longer had a reference to what I did when I sought remedial actions.
Only once did the examiner break the rules and permit me to 'view' my own workings...and only probably because I had passed.
I think that rule of not being able to keep your exam workings is a crock of shoe.
As for your resit. I'd leave it for now. You're prolly too wound up about it to make a decent go of it. Put the subject on the shelf for now and tackle the remainders. Then at least you'll know how many resits you have to do. Worked for me when I flunked airlaw by a whisker. Tackled it later and aced it. Everyones diff tho, the revisit later approach works for me.
Good Luck
Jas