After my ankle opperation I am still in so much pain 8 months on?

More info please! Sometimes it takes about a year to recover from surgery. That being said, I need to know the type of surgery you had before I can answer correctly!
Talk to your doc. Persistent pain depends on why you had the operation and what was done. Your problem may not have healed, the treatment may not have worked, your problem might actually be different than the one that was treated.