U can temp increase ur iCloud storage to 50g 1 month is only RM3.80. After backing up and restoring u can then cancel the subscription.

i thing ringke fusion is cheap there.

for second question you can try this trick:

Settings > General > Accessibility > Assistive Touch (Turn ON)

instead of slide up, stare at your screen, when locked icon become unlocked, 3D touch your assistive touch

if you dont like 3D touch, you can custom to single-tap, double-tap or long press