I do think you should see a GP to confirm this is indeed Plantar Fasciitis
If it is, I’m not sure any cream can treat it . However, if it is just cracked skin that may help. Best to get a diagnosis though. You can usually help plantar fasciitis with things like rest, ice packs and comfortable shoes. A foot specialist can help if it does not get better.
If you see a GP, they'll usually suggest you try these things:
Do:
rest and raise your foot on a stool when you can
put an ice pack (or bag of frozen peas) in a towel on the painful area for up to 20 minutes every 2 to 3 hours
wear wide comfortable shoes with a low heel and soft sole
use soft insoles or heel pads in your shoes
regular gentle stretching exercises
exercises that do not put pressure on your feet, such as swimming
take paracetamol
Don't:
do not take ibuprofen for the first 48 hours
do not walk or stand for long periods
do not wear high heels or tight pointy shoes
do not wear flip-flops or backless slippers
try not to walk barefoot on hard surfaces