im not sure what to suggest as you did use medify which i found to be the best resource!
however, here is what i did:
I started 6 weeks early
for the first week, i read and worked through several UKCAT books and watched youtube videos for technique
for the second and third week, i worked through kaplan online course (WASTE OF MONEY)
after that, i did medify online bank (best money i ever spent)
i got 757.5 average band 2
vr: 670
dm: 750
qr: 860
ar: 750
i think u may need to find some better stratagies for each section!
good luck