I want to get some more detail information about your problem-
How long the problem is there?
Do you have any other disease?
Do you take any medicine?
Waiting for your reply.
Thank you for the information.
The pain in your foot probably due to sprain which causes spasm of the muscle tendon often requiring a period of immobilization.
You have already taking rest and applying moist heat and also probably you are taking Diclofenac, it is not helping.
In acute pain ice pack compression works better than hot compression.
You may need cast to give complete rest to that part.
An X-ray may be needed to exclude any other pathology.
I would advise you to consult doctor for examination and start of proper management.
I hope this will help. Please press the ACCEPT button if you got your answer. Your Positive Feed back is dearer to me. Bonus is appreciated. Thank you.